Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eecf2f6b3e9b59b…

MALICIOUS

PDF

75.5 KB Created: 2020-11-10 00:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45043b7fcce0931d493f0416f4476b06 SHA-1: d622721e327fa8eceb58d10030bcba66dbe0ab1f SHA-256: 0eecf2f6b3e9b59b0d94a88f4fdd54e1588aefb071a5d16f7e41ce0432f5c083
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. One prominent link, 'https://traffine.ru/123?keyword=download+facebook+app+for+android', is presented as a search result, likely to trick users into downloading malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?keyword=download+facebook+app+for+android
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5fa9bf20e073a.pdf
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f9a515021bdb.pdf
    • https://cdn-cms.f-static.net/uploads/4380379/normal_5f8e8d2c6a2b5.pdf
    • https://filojekejo.weebly.com/uploads/1/3/4/4/134446685/1244158.pdf
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/3298954.pdf
    • https://giximelet.weebly.com/uploads/1/3/4/2/134234701/3093775.pdf
    • https://cdn-cms.f-static.net/uploads/4467577/normal_5fa9c2d1e00bd.pdf
    • https://gafalevomunu.weebly.com/uploads/1/3/4/2/134235362/kikopem-piwowupemama-zimusonazuwez-jaroxuxigobusir.pdf
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/wepelisujuxud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7910dcbf-9abc-4b0a-8c68-bccd6d70fcc1/22120992598.pdf
    • https://uploads.strikinglycdn.com/files/ebc8af08-3968-438c-bf0e-65a593726ffc/34319154390.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eafc.bin
806e29b693d0f5d11fa006913e2ab19e37ff7f3b767129ef83a310f1e2c1e4a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 5268 bytes
font_01_sfnt_off0000fd0f.bin
996b8f718ed5f697a787dc1f0f9b40a139e15a70a8c2e9116403a290e3772799
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0F 10604 bytes