Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae04e04f7c8fd06…

MALICIOUS

PDF

80.0 KB Created: 2021-03-06 05:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d3e236f79c766c16c7af133fd5571ea3 SHA-1: 40832c2105a68cfbe74b553d980d3449ebe08bdf SHA-256: cae04e04f7c8fd069de85171c546b08f7f1e51dcdd702ba08603ea0388c950ec
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically appearing as a search result for a NATO treaty question, likely a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/award?keyword=what+is+article+5+of+the+nato+treaty+brainly PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463264/normal_6006151b47e92.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzededoz/FfVY1hj/launcher_for_android_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_601583c4986d3.pdfIn PDF document text
    • https://cdn.sqhk.co/numorolele/ijigiek/lumidiwurupapogagomelo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fc8d22f7dc0b.pdfIn PDF document text
    • http://safetymirrors.xyz/dropwizard_tutorial_intellijao4ve.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/cjhbjjS/82570721140.pdfIn PDF document text
    • http://usesucre.pro/21623652929li3kx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500893/normal_6005d9b1c1e03.pdfIn PDF document text
    • http://inertbhjbj.ru/where_is_pressure_switch_on_carrier_furnaceyaicf.pdfIn PDF document text
    • http://keto-menu.online/peterekktm1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422161/normal_5fe843eb6c711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418379/normal_5fcf693651fc7.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/cieghtg/33947028177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448719/normal_601e72a4dbef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476930/normal_6015b24d3634d.pdfIn PDF document text
    • http://xagimovuroj.22web.org/s-_corp_accountable_plan_reimbursement_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_6030774c17b3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://topemuzopapegu.epizy.com/13270464557.pdfIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_cf3d30d846664c5ab7e94f2902a8b682.pdf?index=trueIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_1093fc2e4e554ba89cc4020fc2ce2d90.pdf?index=trueIn PDF document text
    • http://bijamujijupife.epizy.com/wepivepimevi.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_8c0733e49af54efd9c8d2b86d59febf7.pdf?index=trueIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_bdd51acc616f4c1d8946555d0f44072b.pdf?index=trueIn PDF document text
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC83 5348 bytes
SHA-256: 1997d380cd356826fec3185b3675a752d666b5cfa7ed2846409ae9c36d601d05
font_01_sfnt_off00010ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC9 10264 bytes
SHA-256: 3fc5b3f87313754c686cd4fd3573523ecdb450d9022ccc4f34297cdd0b515690

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