Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5ccaef4327bb00…

MALICIOUS

PDF

63.5 KB Created: 2021-01-01 03:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4ea736254655dd4c62d20fd50af32ed9 SHA-1: 15d1c3cd631a74c23eb881e43bd9926e16a6bcf8 SHA-256: 7f5ccaef4327bb003f4882819279939a255f8db5b3816974b6b86c07f6ffbbfc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including one pointing to 'traffset.ru', suggesting it's part of a phishing or redirection scheme. The PDF structure itself is also suspicious, with duplicate object definitions, and the presence of embedded links points towards an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

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://traffset.ru/strik?utm_term=rose+red+2002+full+movie+123movies PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5fc86eb4388e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473052/normal_5fe0bf3957051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8a9d29baddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454052/normal_5fa76b2b26abd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459463/normal_5fb3cfab8759c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406793/normal_5f94771736591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_5f970ce324a37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5fd1c456854ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_5fd13c2e09116.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/nedidanufapod_rimogoxurijasun_sopubiga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490366/normal_5fb4b6972a74b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f9f35c2b0b2a.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_off0000ba2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2D 5400 bytes
SHA-256: 4b18d5e2b91c61247b3af580feb0c3d3cadf792d40b7e8e3da70abc606a885bf
font_01_sfnt_off0000cc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC89 10372 bytes
SHA-256: 5ef79238db8625636db7a3fd9464bcbaf52a44b8a8e55de066f42ad3b73a7e23

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