Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10046660e22f118…

MALICIOUS

PDF

90.9 KB Created: 2021-08-01 23:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1c8a6a0faff6f908609064e77cc81f08 SHA-1: ca3af13c2fecc951ec8ea82fab021527a7fb8f5a SHA-256: e10046660e22f118629862affb7f5c2d7bf39405b4d7513155fed79bd8a1a604
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits multiple indicators of malicious intent, including being flagged by an ML classifier and ClamAV as a phishing trojan. It functions as a link farm, directing users to various URLs, some of which are hosted on compromised CMS platforms. The document also contains instructions to disable security software and provides a password for an archive, strongly suggesting a payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/0b5e0ae19591f5ac489322aac1a59ec5/xipupapakadatijijofad.pdf In PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e059b2425a---wadesexitaposoz.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/d7742f5f615e41b5dc0147caa62115f0/57650307678.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609349c11e627---gilivis.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/sebavafinat.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/dc080b6444bc91c9f9df323545747c1d/32786112336.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096484e2e53c---29765996912.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/dalimuzagoreza.pdfIn PDF document text
    • http://katachizu.com/img/news/files/98740579364.pdfIn PDF document text
    • http://ithaca1961.com/clients/875375/File/zuxezuxun.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/farigotanitumotuvatug.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/19orgaej733nuc2ssjv1487vnl/xonenorodiwazazogovive.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/1348906278.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/dlgbj2urp1ickj9bf61gfpa2q2/29803435251.pdfIn PDF document text
    • https://pmms-online.com/assets/file/pitekefupipa.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2794b706c3eb3876492606549f7d5ee2/50147527911.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16072c01a36a01---64378994587.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160797f066ce2f---nurebiribedizoxibixev.pdfIn PDF document text
    • http://prosquash.by/data/romabutilud.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607709f5ec897---68529612258.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c94d8c5360f---47339914743.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/4104949592.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/nilisikajijavel.pdfIn PDF document text
    • https://scalper.ir/data/files/file/wuxudogoloz.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3f913a933.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/paguxow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=need+for+speed+most+wanted+download+for+pc+windows+10+2005PDF 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_off0000faf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF7 11272 bytes
SHA-256: db9808621b71d3e6640268df420bbe199019078ec89669b16a4162661954303b
font_01_sfnt_off000115a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB2 17656 bytes
SHA-256: a6927ab8ffa6c80108849bcec95fc827f2088d0ae3cc0c09d997728a26cc2d77

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