Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0cc34858d48c94…

MALICIOUS

PDF

65.9 KB Created: 2021-01-03 04:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 518a1c536a1a9b2a8c44575cd773d9d2 SHA-1: 50bbf350a2634d8fe58259a9fb5847a8e76537fa SHA-256: 8a0cc34858d48c94d68d9d89c48c3d7d6efe5c3b1746479ffc3d10a3f20d9493
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. ClamAV and ML classifiers strongly indicate malicious intent, specifically identifying it as a phishing trojan. The embedded URL 'https://trafffe.ru/aws?utm_term=james+hardie+scyon+stria+installation+guide' is likely the primary destination for the attack, masquerading as an installation guide to deceive the user.

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/aws?utm_term=james+hardie+scyon+stria+installation+guide PDF link annotation
    • https://vulewerogoxo.weebly.com/uploads/1/3/4/5/134507491/fobogobofufole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450160/normal_5fa499aab76cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381551/normal_5fc8d174606c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476580/normal_5fd3886738c56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456143/normal_5fc8b2efe8948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f91212db7018.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/156e1688-53b6-4e85-acea-19a66610dd5f/soninuwanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea88c3f9-b62b-4fc4-b26a-86463880bf6d/7642932830.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/romuzufufunema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a6c110-7113-405f-a7b2-d880da3ebbe4/70601971528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe0ea63-0d88-43d9-a708-2c1de8da4f92/ocho_caracteristicas_de_una_iglesia_saludable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f1f47ac-09a4-4661-8818-52ecef838d66/bobs_burgers_recipe_book.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/92721031772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b380d6-a7e1-4a47-a008-5bf50a1642c5/suzigarenufefivumikedom.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_off0000c760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC760 5444 bytes
SHA-256: c1a8ecfab8838fc4e309adc2fadece181de25d6290695d1e1e9888a1b08f5118
font_01_sfnt_off0000d9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BD 9596 bytes
SHA-256: 9e8f2de8ad02cc78dcf2bd66c56d2887c4001f009f269e0183ed41a147013d9c

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