Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2832f0d517cdee…

MALICIOUS

PDF

75.7 KB Created: 2021-02-16 00:20:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6c74e728b32a9286d31fedbaaee2a192 SHA-1: 1ca9e02fa223f01ed8f2e08056a97af5c49434af SHA-256: ab2832f0d517cdee3cc7252997352b25713645a4ff393fe7239ba4edce81bb9e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/strik?utm_term=women%2527s+roles+in+the+1920s PDF link annotation
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/jolir.pdfIn PDF document text
    • http://optarfes.com/gimaxavasikuxozowuno6vxva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_600c618021819.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/T10PQYF/revheadz_engine_sounds_mod_apk_1._13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427820/normal_60052d736818c.pdfIn PDF document text
    • http://klyshsheff.xyz/the_book_of_yokaixvip7.pdfIn PDF document text
    • https://jukosixosibi.weebly.com/uploads/1/3/1/8/131871462/1712280.pdfIn PDF document text
    • https://cdn.sqhk.co/penuvipaw/abi8Njj/sports_connection_northlake_birthday_parties.pdfIn PDF document text
    • http://auth02mobility.com/27294347472z8hp8.pdfIn PDF document text
    • http://promoocaoameericanas.com/43730424251buhne.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/xugigabitulu/52110189737.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/b_r_automation_studio_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/benulinibosiviwun.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/95861876397.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/subilapuluzudoxasevanepu.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_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 5244 bytes
SHA-256: 13cb3154a2d9712a0714f2ed5850c637f9d66b8ba746c605e57d9106e99379f7
font_01_sfnt_off0000fa43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA43 11596 bytes
SHA-256: 7fb22c8e5237d271e869d00585979b3949ff3ed75bdddadc5e8ac606b2bb5b5d

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