Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e0663ca3706b6f…

MALICIOUS

PDF

70.0 KB Created: 2020-12-16 19:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6efce56c194135d73eac8f6d73380a35 SHA-1: 24b97c4fa7671e073318b064581fc5339c24e67a SHA-256: 12e0663ca3706b6ff659ba1a30163d4e5b91b7c78b71be6e4cd130f1d0db63b6
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. The document body, though heavily obfuscated, appears to contain keywords related to search terms, further supporting the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=spice+rack+ikea+bookshelf PDF link annotation
    • https://ganakinupep.weebly.com/uploads/1/3/4/5/134599301/wofevebokododa_kejivarowoje_guvolowerimipo_xawetizapo.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/gifezesifanap.pdfIn PDF document text
    • https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/bivavonef_lawolalapitew.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/jumibopegixifazoga.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/sedutitemun-dasidazulipi-vejevexolan-xetife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f947bf42724d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_5faabe50affb1.pdfIn PDF document text
    • https://mesedegusi.weebly.com/uploads/1/3/4/6/134600151/3012550.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0b633d26ff1194f72bba3/t/5fc0fa24cb3e0f57717241de/1606482469170/mutator_methods_java_private.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/simple_carburetor_working_principle.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/xumegowoxadav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19ab11452f90b7fea4d21/t/5fc3d58118e72e5fdb4d69f4/1606669698431/bofuvekisotasop.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_off0000d3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CA 5412 bytes
SHA-256: 5bc1f0f82f459945229898812a680e06246052ea64d9e19a439d733396e0daa2
font_01_sfnt_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 10900 bytes
SHA-256: 093e002254e4a39cd07c2f2be35ba463588cda9e624ee7c0e74ce34c3192458e

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