Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bbf9b5904743cf…

MALICIOUS

PDF

71.2 KB Created: 2020-11-22 05:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6cdbcc2b840edce0627e69cf2d0f2b83 SHA-1: 9944d08b86c9e563eb3506b80e57d655ca6427fe SHA-256: 09bbf9b5904743cfb2aabb9eb761a4a63f7b5b722dd553416ca4170f0a43c6fb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document and a link farm, with multiple external URIs. The embedded content, though heavily obfuscated, suggests a lure related to software downloads. The presence of numerous external links, including one pointing to 'trafftec.ru', strongly suggests an attempt to redirect users to malicious sites for further exploitation.

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://trafftec.ru/aws?utm_term=openshot+video+editor+for+windows+8 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f9509141871d.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/606c3c.pdfIn PDF document text
    • https://fekolulowezomo.weebly.com/uploads/1/3/4/5/134593542/7228336.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/72779407302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8f7e6a-1a13-45da-a49b-6eb0a5b7b5fe/haynes_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b05fcd20-c061-4127-bf38-c9c8c453693b/fnaf_files_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec760670-169b-4037-a86c-9aeacb40524b/rifarixekujikosojepuj.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/sajoxuvafifova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226fd52b-8258-417d-9c59-cd65c440cf75/volumen_de_un_cilindro_recto.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/sakar.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/balaxijojiwe.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/sekenemo.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/53535501012.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/46084214148.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 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA7 5260 bytes
SHA-256: 0ea841c828d8339ed48ff6d203d5f96ce93df12bb75fe0d460ef7c925bf6cb9b
font_01_sfnt_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 15912 bytes
SHA-256: 8003b1d854f00932cdee163e35291dd009aa146d16d7f49b4bfe7d12954e2a34

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