Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f4e0bc0a4e380b…

MALICIOUS

PDF

69.6 KB Created: 2020-11-17 10:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6ba739355457d65ed994d76db02347a1 SHA-1: 3e28da520b611645da02613e28d526e6fb208fad SHA-256: 07f4e0bc0a4e380bc5da6892f70f5848d07dd2756a923399077f26abcaf49c29
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 numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://trafffe.ru/strik?utm_term=svt+3eme+l%2527homme+face+aux+micro-organismes+controle', is flagged as suspicious and likely leads to malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating a phishing or trojan distribution attempt.

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://trafffe.ru/strik?utm_term=svt+3eme+l%2527homme+face+aux+micro-organismes+controle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382004/normal_5f9171753382b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5fa07abfeec5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422627/normal_5fa7cb35a8534.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/pomukeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f96227fd5307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f898776211af.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/matuwaduwuvibad.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/zaxawetawupo/zufaxokoruzamotukuzij.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/sekita.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/96988297005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67339d77-5a8b-4611-8cf6-b8391d77e7db/meturulifulomuzibarulon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d3ea20-c031-43d9-a3ae-eb60d5f78ff8/self_authorship_program_jordan_peterson.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_off0000cdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB0 5756 bytes
SHA-256: 1b999c8eb856e051714f730a8a032148639675e5fd01403b6f959a3413cc7a81
font_01_sfnt_off0000e138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE138 12176 bytes
SHA-256: d3d063d3d76d83c9c779f09a5a2bcd3dde7b2ff8735622f87a44c0dfc9913d24

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