Malicious PDF — malware analysis report

Static analysis result for SHA-256 e251f643f8dd3692…

MALICIOUS

PDF

71.6 KB Created: 2020-11-11 05:46:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9a89e9e63f4417d87ad73cef354b782e SHA-1: 922c3eacec9f99e220a444350695d91bf44ff80e SHA-256: e251f643f8dd3692b6beb3e466f19d8bccd3bb6bbe6515094f3189adc4ea6471
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 0.9997

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://traffking.ru/aws?keyword=2008+jeep+patriot+repair+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5faa2b7ea7b08.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/novenebegejowiz_guzovaduluji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460243/normal_5faa3d5a403d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5f95dab397fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470024/normal_5fa73e5042767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f87387de13e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5f8d45e436e0d.pdfIn PDF document text
    • https://mixekolasum.weebly.com/uploads/1/3/4/3/134388380/aca750d85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8fc216bbdf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f8d870332233.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://uploads.strikinglycdn.com/files/8fadb9a9-351d-4512-b7dd-76c2fa0a0d0f/20240929997.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC21 5340 bytes
SHA-256: cf2927df6106001b5e521a98f335336ffc0b6bcada2bfeb51410c603b7717058
font_01_sfnt_off0000de23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE23 10868 bytes
SHA-256: 9df37486ca7eb7057e5f066005d42f1763fa1eaded694e1f53506f186d038ca1
font_02_sfnt_off00010340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10340 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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