Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e30a81403437df1…

MALICIOUS

PDF

62.0 KB Created: 2021-01-13 16:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9d79ada992c8974a15a6c4c625e80f1f SHA-1: 4ce50db44ce2e105b3896bbab5573d007cbc8466 SHA-256: 4e30a81403437df118cb77f7d88790ea31ab7ed0d86c2e0ed3bc1fd5b96c8fb7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external links points to 'https://trafffe.ru/wb?keyword=navneet%20kumar%20hinduja', which is suspicious and likely part of a malicious campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://trafffe.ru/wb?keyword=navneet%20kumar%20hinduja PDF link annotation
    • https://site-1168150.mozfiles.com/files/1168150/freeze_dried_dragon_fruit_trader_joe_s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5fa506ece00bf.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/1240878.pdfIn PDF document text
    • https://site-1177443.mozfiles.com/files/1177443/kits_dream_league_soccer_2019_juventus_champions.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/9iaQjc7/4674136655.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/jojitagifuva/tirataburo.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/g_ka_full_form_kya_hota_hai.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/a_level_sociology_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/blank_baseball_caps_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/19096389813.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/bailey_junior_high_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/fgo_prisma_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/26124839105.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_off0000b694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB694 5024 bytes
SHA-256: 59e8c4b4da183968182d469aa9c8030e041df2f3ff5e83df8b66b76024343167
font_01_sfnt_off0000c791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC791 10600 bytes
SHA-256: 5b8afaa5f039b643d01c191c3437fb6b23fca33247a9179f34d4b30c33fed5ce

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