Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9faa94af1498f00…

MALICIOUS

PDF

75.3 KB Created: 2021-01-01 02:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 25f4f584dfb0231c2339ee4d02343af8 SHA-1: eca0b15f185863ccb613040773c097d8e4f034d8 SHA-256: f9faa94af1498f007250a1626c5e79c375407f6f7aa45e5640e89ab6c5653aba
154 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 'traffmen.ru'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=female+captain+america+name In PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/2471244.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/gobutekuturuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_5f8f287002d63.pdfIn PDF document text
    • https://buwolerujagelav.weebly.com/uploads/1/3/4/5/134580081/sutip_ruzivexajojekef_dufupusugib_lewisaxavav.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/aabca3c5af59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f5b80b72-531f-4d85-b682-d2f111d0cb50/35213412936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21fc1ddf-8ecd-4f38-a782-12ab320afe58/79303989502.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/jisotezelevejele.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/frozen_shoulder_rehab_protocol.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/ar_drone_2._0_user_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE72 4532 bytes
SHA-256: 76afd33faa965bd42aeeed1b36f2bbc3051fbfa9b9ea2e8d877a57c7b13d17fc
font_01_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 10768 bytes
SHA-256: 95e87652be02113f302b0e7fb936fdfb2f998e6c028b3f28c031dd2b089bee1d
font_02_sfnt_off0001129e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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