Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba959b275204b36b…

MALICIOUS

PDF

61.5 KB Created: 2020-11-23 11:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ce21fe1bd6215d1e482d1edd5c02de89 SHA-1: d7c2b39a5c1ffe4d122c1bbd78469d24e736d17d SHA-256: ba959b275204b36bff710525fa73b5c095deb5f3ebc7501bd2e4aaa636bee4c3
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 0.9996

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://trafffi.ru/strik?utm_term=2002+mazda+protege5+service+repair+manual PDF link annotation
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/6005805.pdfIn PDF document text
    • https://duzetokip.weebly.com/uploads/1/3/4/4/134404829/bewigibexatom-tatesiliwuzid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475997/normal_5fabf6ceeb765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455645/normal_5fad8ecd7be75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2433df5-fdc9-4c36-bcde-da069b30f439/canterbury_tales_where_are_the_pilgrims_going.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5796765b-000c-417c-92de-7bb7dd7d2f8f/vuzuxasuwowubukazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1b96f1-9b9c-4e45-9717-1fb890d6fad3/que_es_tipologia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fecb28fd-6408-4f60-9ad2-8dd9b329120f/lotadip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6656519c-e1a4-4136-abee-fee9a81ff56e/29335885652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e13370-bec0-487d-9903-4cb600dd1c4d/vetotukezige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c508acf-98fd-41bf-9161-16f02d176d9e/99005751866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23eaab61-e80e-4e15-a3a8-f47d42a20783/30468952482.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB10E 5804 bytes
SHA-256: 9f554e06b71ef7507c9e24b0f9906187ab9b3b05b9a11f75f8c19286ac6365f6
font_01_sfnt_off0000c4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CB 10812 bytes
SHA-256: 5be43820c959501e5f0c5da03d8be69f316b6413d923ba0b82a62df05439d9d9

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