Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea760cb75a236c6…

MALICIOUS

PDF

77.3 KB Created: 2021-03-23 09:42:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c217348686610eb10749f23f7332e72e SHA-1: 99d02d201752774c2babd1e72c1d5c662bf73d05 SHA-256: 5ea760cb75a236c699ef92ce910db91954246c59a5bd76334e8f72168c62aa5d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs and the nature of the link farm point towards an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=mini+dv+camcorder+player PDF link annotation
    • http://jugadeguxapit.iblogger.org/45089988875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408862/normal_5fc91339af5c1.pdfIn PDF document text
    • https://cdn.sqhk.co/wegodimumod/agdihkX/61947190248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_5fd9de3ceda3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5fd15249ea758.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/uwjegfh/datita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_60597787c13ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesinule.rf.gd/43787885722.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_118777a9d24a4a1f9118e98b6d4d22ce.pdf?index=trueIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_d4505bc6a7e34657936d91fc556c687f.pdf?index=trueIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_0ac3bbd49b4248198eecd5af1c6edfc6.pdf?index=trueIn PDF document text
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_43914004b50a403ba0bbf90b59fb91a1.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_30410d48c25a4570b9c4715a17769832.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79b2813-8844-494f-90c8-c0df563f9e50/the_secret_law_of_attraction_movie_review.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_37c32e1c55434fe3958181e89b36951a.pdf?index=trueIn PDF document text
    • http://sabodivatipapan.epizy.com/home_touch_steamer_ps-200_replacement_parts.pdfIn PDF document text
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_20c9c30c3c524b6695de36c31fce9bcb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/073dbcb1-5683-44d4-95aa-d109b0246a2b/29837270895.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_538b056afdc348cba2a7f63fb5ccad18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d62d0a-7811-4fe8-b27c-ec7119d3b3c3/91800549075.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_off0000f1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F0 5208 bytes
SHA-256: 89b47afdeb3d05f8cc78a77c15e1fa0e7efd9ec1231accbc1df3a3db7d12c5cf
font_01_sfnt_off000103a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A9 10568 bytes
SHA-256: d38c52b80b1af1f78342b0012b07eaa58f58cef36355dd93cd3eedc48d3a9ae2