Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36ee461d5e8df4b…

MALICIOUS

PDF

69.5 KB Created: 2020-11-26 06:30:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 05a1da6f41c96b050d12c323823eb2fa SHA-1: 931f229b4b0553f088895ba667226882a559732d SHA-256: f36ee461d5e8df4bfd9b7b0c0fb5e15307a4e34748ac9867448df488343a6687
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=best+body+wash+for+sensitive+skin+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473656/normal_5fb9c71b97ff5.pdfIn PDF document text
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/384b3db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f9e4a53270bf.pdfIn PDF document text
    • https://vijosiza.weebly.com/uploads/1/3/4/7/134746498/rolaxezufeb_xedemovil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5f99d007ed711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393631/normal_5fa5e16731a18.pdfIn PDF document text
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/5990539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480753/normal_5fbe8eb7ccc2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_5fb57f4a8f651.pdfIn PDF document text
    • https://losazutuliwuja.weebly.com/uploads/1/3/4/6/134622760/e3b869bedf.pdfIn PDF document text
    • https://sisekiki.weebly.com/uploads/1/3/4/6/134622657/pezisese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/juvetaso/blackarmor_backup_software.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/mario_bros_crossover_4.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/ireport_java_1._7.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC458 5532 bytes
SHA-256: 278844404d66142ac992ea79414e1c1a3d35f5be86a1cb3538d740ff35c02882
font_01_sfnt_off0000d73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73D 10548 bytes
SHA-256: e5a15afd4ea1642536d6a8b3da45d0177767c58c8069b56e844ac89be4fbcb28
font_02_sfnt_off0000fb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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