Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75f4a704d8fcc66…

MALICIOUS

PDF

77.5 KB Created: 2020-12-24 14:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 08b1c699c3cdd7e3ec34b37230327332 SHA-1: d20b89cae25d0e68ee9013b5ba4a08287c217166 SHA-256: f75f4a704d8fcc669602d1f80a572614fd9fd716859fd91ad6c49d6b62c880bb
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 detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. The primary external URL is `https://trafftec.ru/aws?utm_term=invitation+design+template`, which likely serves as a lure or initial redirect.

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://trafftec.ru/aws?utm_term=invitation+design+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468259/normal_5fe132a8e2647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528915/normal_5fc258db92874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485329/normal_5fdb953d8e7fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412889/normal_5fe0c8e1bb82e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453579/normal_5fc67b5a6e9f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5fbd7f8f72052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444366/normal_5fae382ede224.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/AhheFij/cool_assassin_costumes.pdfIn PDF document text
    • https://kerutefabiwemek.weebly.com/uploads/1/3/0/8/130874269/tesuto_besabe.pdfIn PDF document text
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/fizivi_kogebugojebi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460233/normal_5fcf475fc52ea.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/ghijIZ5/ravensburger_puzzles_kidstuff.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/fezenaga-dajedozafod-jikedafetudike-julureje.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_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 5180 bytes
SHA-256: 5d3f257b226668d6b36feb466a3cfb35562a19e3236add8e209d8883edaaee23
font_01_sfnt_off000102df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DF 11308 bytes
SHA-256: 0c31b2d4243a7932c212b95d17f544945826438397c23fb51a695ee06c9cdcfc

Open this report in the interactive analyzer, or submit your own file for analysis.