Malicious PDF — malware analysis report

Static analysis result for SHA-256 27dd07571d090c1f…

MALICIOUS

PDF

66.7 KB Created: 2020-11-26 05:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a0f215e6f35fe2398cdda77b9c442ee3 SHA-1: 172d409c77e79a8331cbce0fd44f46f875c61b7a SHA-256: 27dd07571d090c1f4b6122241d04425893b981f5fc6eb99c0d8e7e333ad040b8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=rail+runner+schedule In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f89f7c5a6371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_5fa8e1aba2ef6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f9918aa96909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_5f93798d206e6.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/xirixepo/meme_templates_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe96f689-88ce-48c6-acb2-813b18e31223/jigafetegodesubep.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/xekexojuxikibokizi.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/blood_magic_mod_minecraft_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/58188817818.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/wilson_bureaucracy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412f7a1e-8ef0-42a1-bcc7-25c3a1bde7bc/binogewimimufubifakorazip.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/nekapovonokuloniwilape.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/central_iowa_bible_camp_auction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2aa1405-b72f-4676-879d-e7a652b4477c/duxelojexupuditizerowaz.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/haccp_logo_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e64597f-ed2d-4e37-b7d8-2ad6ec5159d8/comprehension_worksheets_for_class_8.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_off0000c713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC713 5032 bytes
SHA-256: faef7fab1a00638cd8d4476b69b66833b511c1f77d6e37e197cc9da69ae712db
font_01_sfnt_off0000d829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD829 11368 bytes
SHA-256: 60df546020cb04626133cae570f9cd3b2c862fa80254e193b41b98d75fc3ee80

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