Malicious PDF — malware analysis report

Static analysis result for SHA-256 beead2733e80215c…

MALICIOUS

PDF

79.9 KB Created: 2021-03-27 18:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f904d4094dcedca59058901da8984b20 SHA-1: 93e72aa1efe70359903b6edfd13e19437d209c69 SHA-256: beead2733e80215c1e420bcb29f8142cdbd0e27222cbc1e3d6f5b9276bf8f6fa
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/wix?keyword=elder+scrolls+online+potion+of+ravage+health PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409798/normal_5fda7562abace.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453144/normal_5feafbbf3cd46.pdfIn PDF document text
    • http://ttttrrrr.space/zetumopepifatiselu3h6kf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414173/normal_5fe25fbd420d0.pdfIn PDF document text
    • https://ladevizeloraben.weebly.com/uploads/1/3/1/6/131606454/jurixi-josefasoganof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458634/normal_60076b2c3a4cd.pdfIn PDF document text
    • https://labafapagitef.weebly.com/uploads/1/3/1/6/131637364/zodaxari.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376609/normal_6003518a779ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469358/normal_5fd9fdca3971f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419235/normal_5ff7bb231d3cd.pdfIn PDF document text
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/suwuwamizirixa_xubudakef_leregozage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_6047407677f4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_602049eed6f7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_5fe7f7725d577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454422/normal_5fd306fe86550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5fdb23491575c.pdfIn PDF document text
    • http://umniashka.ru/60280349567qfv92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496607/normal_60341327eb690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/66805734960.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/mopemuravarepes.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/43585991353.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/pusevoteregusij.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/14167988216.pdfIn 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_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 5432 bytes
SHA-256: d5782aef3e82b2da100c0efe92e88c52c8f81b88e173223b69c2833ee367dc60
font_01_sfnt_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 10304 bytes
SHA-256: 65b94ab1d6b1790fbcbdf3f3ab08e7f5edb8972c3453c2f3a5dda6fef336be69

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