Malicious PDF — malware analysis report

Static analysis result for SHA-256 c074481f7d548564…

MALICIOUS

PDF

80.8 KB Created: 2020-11-16 14:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c036aef6d736ccdaba2d4c0b864bc8f6 SHA-1: df34a7cc9280cbfa828b42e0bfd6dbfed918fc32 SHA-256: c074481f7d548564c0cd83280f133d9d7057f2a7800d4010c0aaf890507a7115
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=pioneer+p41+chainsaw+manual PDF link annotation
    • https://zojegidaluvimov.weebly.com/uploads/1/3/4/1/134109086/2c525e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_5f8cae1367c41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5f8c035baa189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5fb02b02146a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5faa5e0a635ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f870282c61a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fa8c689c204d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404955/normal_5fa46b3d80927.pdfIn PDF document text
    • https://gogozugibijom.weebly.com/uploads/1/3/4/3/134369614/b28d249c200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5fb25ba8bdf3d.pdfIn PDF document text
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/6469595.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/af1ef9e4-8fe6-4bd5-a14f-92caede50396/nomarasifavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e2686ba-4f7e-468f-a4e2-25d5d72f5381/90367293318.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_off0000ffe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE1 5404 bytes
SHA-256: d2dcd83674d7cfa9f795460107b05137bc5338c0197f6dc339353f2a85353b4e
font_01_sfnt_off00011237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11237 10624 bytes
SHA-256: 67b11281b996e37452426a12c4c7bad67ba48300565c4e173041c0e8cd523e3f

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