Malicious PDF — malware analysis report

Static analysis result for SHA-256 600d971345653ad5…

MALICIOUS

PDF

95.5 KB Created: 2021-08-03 22:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d8716531b74895627976e7c7d92215e1 SHA-1: 8182826db51b58a5b8b03ae74f91b05c8d1a6ddd SHA-256: 600d971345653ad5d09a89be3f7fe321991e9ceb8925653a36f6f60869eb59a5
276 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document is flagged as malicious by multiple heuristics, including ML classification and ClamAV, indicating a phishing and remote support lure. The document likely aims to trick the user into downloading and executing a payload by instructing them to install or connect with a remote support tool. The presence of numerous links to compromised WordPress sites and disposable hosting further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0ec6a8c35---37786660264.pdf In PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/181b0aad053bfd18871e1ef01adbd734/79019440803.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/ad1e7682cb4f6fb0d9259f943a531c01/77000181117.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/df8bc9dc39243739f0a98d11a0a4f782/16097192884.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/padavikidafuwunazewilowu.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/dogefovuforavudatifi.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/827621ba23b7d1b7580ceb00ebdc0aca/10574378037.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089726526dc1---4523798786.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/56607460425.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/0dd76f78323aef5f2906eb16728a457b/34915273843.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/99dc1897a096a5b429bbc84b6ea5e3c8/wafuwafumeluwo.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/82888475030.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2b45b4149---41668557926.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/45db36b2aee4a016bebe66a5cb9dd59e/96938648340.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/7dadbe6d5ef83d6b1d939cf815e4160d/21076252752.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/33041978034.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/xurojujevurokopuf.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/47718999177.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/fapoputipagekusuli.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/bajajoremijisitujasuvova.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc66bd37920---84360300494.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210801_E6F29EAD4544AC23.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/dc8fbf8e85acf0da610c6f8879cbdccb/kokubuzuxevav.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/ee0e3d2d2278f79fce33932d92fe4c52/rifit.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/51e951dce1a9cc88d7effe068857575b/sireparazejo.pdfIn PDF document text
    • http://fedime.org/imagenes/mokager.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607d482be5de5---jutuxulazinuwire.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=is+anydesk+compatible+with+macPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C35 11064 bytes
SHA-256: 3dd5f3b8ca3b6beedb77596e324ba03719fe79c62de9ee448be326b675ad7f04
font_01_sfnt_off00012597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12597 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA9 19884 bytes
SHA-256: 5afaf77e81b3c3b3f25cf6aeed342a2b9c54ba7df0ac8e7652d0187e8d5863a5

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