Malicious PDF — malware analysis report

Static analysis result for SHA-256 7411122a40b79187…

MALICIOUS

PDF

75.7 KB Created: 2020-12-25 06:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d3392b3abb422ce047278922386d621 SHA-1: d2f5a4cf7a0dc73608ac6e25b422f2d5a1244691 SHA-256: 7411122a40b79187988ed3d5a4a0de6c8f878d8a06e446bcf1afddb7bfee8e01
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm designed to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting an attempt to redirect users to potentially harmful websites. The presence of a fake invoice lure further supports the phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=guided+reading+lesson+plan+template+pdf
    • https://puraxexi.weebly.com/uploads/1/3/4/7/134718411/559dd078b14.pdf
    • https://cdn-cms.f-static.net/uploads/4490252/normal_5faa018a4c5cd.pdf
    • https://cdn-cms.f-static.net/uploads/4448096/normal_5fa6ce065e329.pdf
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5f9c86aabe04f.pdf
    • https://static.s123-cdn-static.com/uploads/4371025/normal_5fe04be15afbc.pdf
    • https://cdn-cms.f-static.net/uploads/4454167/normal_5f9f705ac1ca2.pdf
    • https://kuvanipugeva.weebly.com/uploads/1/3/4/4/134445248/240149a5a26460.pdf
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5fd850c40f131.pdf
    • https://static.s123-cdn-static.com/uploads/4393034/normal_5fcd67b9ee130.pdf
    • https://static.s123-cdn-static.com/uploads/4368958/normal_5fdecd234aa9b.pdf
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f872bb2e60b1.pdf
    • https://cdn-cms.f-static.net/uploads/4484990/normal_5fdc39923b47b.pdf
    • https://cdn-cms.f-static.net/uploads/4414678/normal_5f9a9af390121.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nelizenejakarug/90992203081.pdf
    • https://s3.amazonaws.com/jijumupade/worksheet_kinetic_and_potential_energy_problems_answers.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_off0000e9a6.bin
985245c70c35ef1f1de6bbba55b82953ebbca4f59deb9995221b978661ddaa9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 5392 bytes
font_01_sfnt_off0000fbea.bin
0b455fb6dca5ba780ef441346e0f103a15b9b694095ddb9f5c78cea57891a2f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEA 11244 bytes