Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2ff3084def526e…

MALICIOUS

PDF

85.9 KB Created: 2020-11-25 19:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: eeeeb446b9abae466979af2bc5ea7d75 SHA-1: c76b636cfeb8fbe20496e8ab9c71f1185d5b75dc SHA-256: 7a2ff3084def526e5680ca46a182e5551f53e5e1ec196af73d03d5648da88414
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://traffmen.ru/123?utm_term=how+to+draw+general+grievous+4+arms, is likely part of a phishing or malware distribution scheme. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=how+to+draw+general+grievous+4+arms In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f9af4c98a0e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5fba689004eef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451930/normal_5fa2ddefbd8f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502567/normal_5fb45e392d09f.pdfIn PDF document text
    • https://nezemugobif.weebly.com/uploads/1/3/4/5/134519414/355487.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/9214d5efc9fd700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5f90f42759db3.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/3089918.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7a382f-060f-4ed9-8352-59cf9fac70cf/fatoriwanafapedinuju.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/beginner_guitar_lessons_video_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/70245266887.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_off0001137e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137E 5348 bytes
SHA-256: 30bf0a1ec2683601eaaafcd17a79cd0029eb8c573c484d85237199841b381d18
font_01_sfnt_off000125b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B5 10904 bytes
SHA-256: 43b3a99e8bc1bcc2f2ee9b7249cca3d413e7861c087cd29623d3bd58aea767a2