Malicious PDF — malware analysis report

Static analysis result for SHA-256 626f05ab686e7048…

MALICIOUS

PDF

75.9 KB Created: 2021-04-01 12:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa6888bf3f61336b0fae945dbae8b462 SHA-1: 1056c70367510f78779ab9f37233ea64896fac36 SHA-256: 626f05ab686e7048101f0a861c7a2cb120e3699492e87b89954f9178d76d0495
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, fitting the pattern of spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/award?keyword=articulacion+del+pie+pdf
    • http://xapidomin.mywebcommunity.org/bugaboo_cameleon_3_user_guide.pdf
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5ffdfb7e788e0.pdf
    • https://static.s123-cdn-static.com/uploads/4393197/normal_5fcc2a7d94bee.pdf
    • https://cdn.sqhk.co/kufejeni/fhhiigg/90468693419.pdf
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ff56e5639dec.pdf
    • https://cdn.sqhk.co/dilipokoje/4mlVhcb/82218365074.pdf
    • http://kunewalijaxuna.getenjoyment.net/rinoraxufaranixodamefit.pdf
    • https://kezodedekupamo.weebly.com/uploads/1/3/4/6/134605888/3870714.pdf
    • https://cdn-cms.f-static.net/uploads/4391331/normal_6023d8a68de10.pdf
    • https://vanuvinuvur.weebly.com/uploads/1/3/0/9/130969573/f541f3072.pdf
    • http://gotiwekiz.iblogger.org/how_to_get_my_gas_fireplace_to_start.pdf
    • https://cdn.sqhk.co/vetejevibas/oHiiZK5/mexivatarejalegumomu.pdf
    • https://cdn.sqhk.co/rutisifelom/F7ghjem/73064938142.pdf
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/bcc6deba8ceb.pdf
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/5fa2f0e53.pdf
    • http://miwewumexurigan.sportsontheweb.net/51187698950.pdf
    • https://cdn.sqhk.co/jojikoxazew/jgjfmih/19137653626.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wafinumufi.epizy.com/mathematics_questions_and_answers.pdf
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_5a1d9240e7df45b5aa03a55cbc8892c4.pdf?index=true
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_b380c8e55d5245fdaaf50b925fb41edb.pdf?index=true
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_0519d16cddc943b2bdacbc30c6f3077a.pdf?index=true
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_0207279fcb174dd7bd36c86a71d991c0.pdf?index=true
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_d797e8d74aff4fd495d03caf61c6fa30.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec9f.bin
d15f6f50b34d6559ae56339f0f1c9df0c6c0f20f9c0ae42d32eb39be09e8ee43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9F 4960 bytes
font_01_sfnt_off0000fd91.bin
ce97b82cb0637fe727957f2adbf12d075e7565444e967b66ffdb9209c31f0145		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD91 10828 bytes

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