Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b0c64d0ad52832…

MALICIOUS

PDF

161.9 KB Created: 2021-06-18 05:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6b1bb0707845523d3e39e2e557104325 SHA-1: 229052be8dfed778046186e9684241b696e10322 SHA-256: 69b0c64d0ad52832e2fad252611bf683616b56c0a93002cde2cf7c6fe2c86113
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document likely instructs the user to install or connect with a remote support tool, a common tactic for gaining unauthorized access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c85e267f9be---44005948599.pdf In PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e89da2fc9---titipux.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/jijidekidajaxewogijatevug.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/ada4efa422fce0ec83ef3696ddfa5ffc/7835245597.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3fff5344c---65292639260.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/2nnk0bt38su0ikjnh6i1ceb0rq/wutivevizox.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/gisowotuxenira.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f49a002e8---levodavekaxiwugizisavuke.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b697b0d8fc---92379500458.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1aace55a4fa350aefcd880e139f0ac89/62551242289.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/jezikabowekefovigewuv.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/81004811170.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=yevade+subramanyam+onlinePDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E3F3 3752 bytes
SHA-256: 24e4da6b69df38026b4779b41b2e15b699eadfa6e1fd46df5cda8a956c82d7dd
font_01_sfnt_off0001f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F149 5232 bytes
SHA-256: a9e6a2e533792dfa36b3371de3cdab998e4846ab72c8e15ceae5a97e59b3d577
font_02_sfnt_off00020306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20306 21692 bytes
SHA-256: ce22a30f84f5c0c2d099327a71799570ec0156c7bda3377b298971e9c4147ad4
font_03_sfnt_off00023fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23FBE 21960 bytes
SHA-256: f73cced55cff742be23428d29dca3790fa842c4f25317534dc5f6d76590b0fec
font_04_sfnt_off000267bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x267BF 4876 bytes
SHA-256: 07a9c4b3a4b126f81e89108d48b66389f38afec281def5cbae5e1cd1c39bdfdc

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