Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8d3b4285a90cdb…

MALICIOUS

PDF

78.8 KB Created: 2020-12-08 07:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 44d24b64df20c956c3dfac49110d641f SHA-1: dad22a9bef816228d7009a8118444e5c16081bcb SHA-256: 0d8d3b4285a90cdb2742951b574845d1e6c73d5a65c77d48eab0c441e22d36a0
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 0.9998

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://trafffi.ru/strik?utm_term=vitamix+vm0103+potentiometer PDF link annotation
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/pugofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_5fb362dfb478d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485942/normal_5fba0a46ba89b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_5f94e5f18324f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5f8fb81a2d89d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477892/normal_5fbab67fa0c3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5fb7d3c381b0d.pdfIn PDF document text
    • https://jijidiwudop.weebly.com/uploads/1/3/4/4/134481930/7256153.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/1d83ccc9-d530-4c9e-b613-23c572840aa8/55737268344.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee6908845d09244f1e5e/1606282859412/advanced_accounting_4th_edition_hamlen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c656affbf90a660350a0/t/5fc6175408845d09245b3319/1606817622292/lupajilusigaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10a34403f5353fd968438/t/5fc4f85e5147b14804ce9859/1606744159139/congruence_statements_and_corresponding_parts.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48f5645712565430abf3/1606371574241/dofotekavenu.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_off0000f73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73E 5204 bytes
SHA-256: d40bf075cb3bfc966c9912a8234b7c9200df47427001a1bf5a23f831c18a6044
font_01_sfnt_off000108f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F1 11008 bytes
SHA-256: 1f7376d9850c98efbbaa7e062f7c660acdd5fff066f482a75f7a3e534d89f330

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