Malicious PDF — malware analysis report

Static analysis result for SHA-256 daae8dfa6ba8c194…

MALICIOUS

PDF

86.3 KB Created: 2020-11-26 08:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: fa643ca71805fac5449dd6895eace332 SHA-1: 759dd5098e78b2afcc3f63fa49d926410c8a34a2 SHA-256: daae8dfa6ba8c194b5442b314a3f891bab4291a803538772a3fcafe1798017b6
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=st+francis+raleigh+mass+times'. This, combined with a high-confidence ML classifier and ClamAV detection for 'Pdf.Phishing.Trojan', strongly indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text fragments that may relate to the lure, and the 'SE_CALLBACK_LURE' heuristic suggests a potential callback phishing or tech-support scam context.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffmen.ru/strik?utm_term=st+francis+raleigh+mass+times In PDF document text
    • https://cdn-cms.f-static.net/uploads/4494435/normal_5fbe4057e1703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_5fb7836073e59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385613/normal_5f8d4428438cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_5f94b3923dd33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480588/normal_5fb48b0831a51.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/daniwodug/norug.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/bretonnia_guide_warhammer_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/broadsheet_newspaper_and_tabloid_difference.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/earl_nightingale_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/lumino_city_achievement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/foniwufamumu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/4974887642.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/93549769199.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_off000113be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BE 5396 bytes
SHA-256: 688721fb56e51465e8e79a69b9ac69c58b8a0c2cfee39b5d060bf4ca3cd80eb9
font_01_sfnt_off000125ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EC 11296 bytes
SHA-256: 344943cced9558680cf49211466469b54bd634b4076112cbac52fb71d2f76545

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