Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0bb466168da23b6…

MALICIOUS

PDF

66.5 KB Created: 2020-11-19 20:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: aa798ca4a469090218dbbfbb5fc98f8a SHA-1: d35451fef8d9cb619a68a8dc46898e1d4978be80 SHA-256: f0bb466168da23b65d26d7d8099b87ee66e6e9f7b63616a5d742821be0f744d1
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, suggesting it is designed to drive traffic to external sites. The embedded URL `https://trafficel.ru/strik?utm_term=ev3+tank+bot+instructions` and the document body mentioning "Ev3 tank bot instructions" indicate a phishing or scam attempt. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing document.

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://trafficel.ru/strik?utm_term=ev3+tank+bot+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5f9692b85a8b3.pdfIn PDF document text
    • https://puvujoda.weebly.com/uploads/1/3/4/3/134326666/747d66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460048/normal_5fb4a02fefe8b.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/xudobavula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_5fb27d7aa2427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464067/normal_5fa39a6baff38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5fada1f822716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_5fa74e9122f80.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/d4e2f58d-90a7-4c62-bb87-832f8fff1c22/84544639256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404eb2a6-4042-47c6-8148-a354af43606a/keniguganuvekofov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f940cea-c69c-44b2-abf6-67b865ce8020/sutudoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242aa5d0-6259-42c8-884a-7a56e3b92dd6/gakifevomosatinexibojami.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/gipokawarejomadesodewejek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d567a90d-b336-487f-9122-ed1cc6bd1842/jerodezojole.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_off0000c4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A7 5148 bytes
SHA-256: cdf428d3a6e44028ea9fd97d78445f2b93f7b261e04d27eb7ef4dec614d5bafb
font_01_sfnt_off0000d648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD648 12012 bytes
SHA-256: 09553c95d68d889bf9a8685fac114674e294783138dfdb5202ffac9b6cd428a2

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