Malicious PDF — malware analysis report

Static analysis result for SHA-256 9752428afedfae5e…

MALICIOUS

PDF

72.3 KB Created: 2021-02-19 09:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b46b43695513b264c194b20291836e6e SHA-1: efad9aac6ed5311f6db758e3575802439b5c8a22 SHA-256: 9752428afedfae5edfcf8af54abc766c7507f0c102085e2b508fff5ae0e20f78
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=how+to+get+viper+5706v+out+of+valet+mode PDF link annotation
    • http://stassikorskyi.com/xelujifajovupb3boq.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/5jh79gf/40064232229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5fd3a98e74c3f.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/AOhjhiz/mechanics_bank_auto_loan_phone_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5ffce00fc3a5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376612/normal_5fe090ffaad5d.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/jhmhdhj/libby_beta_by_overdrive_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/gdXJJvF/ethereum_wallet_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/mhahjji/sunedegek.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/Khaiahf/werewolf_novel_prompts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451220/normal_5ffbd06e56ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_5fd0f3c819c80.pdfIn PDF document text
    • https://binapesod.weebly.com/uploads/1/3/1/4/131438069/9460714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479916/normal_5fdc358918c54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_602f52e7ec116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 5796 bytes
SHA-256: f61259b7065df2dc15682a3dee885aa7b561edeaddc96da72a305b8f822e2cd5
font_01_sfnt_off0000ee92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 11188 bytes
SHA-256: 7e8ad6619b12d6fdd30ea641a83de8e0748cc7fd04b28bdf8eb4fe4b9be1a66f

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