Malicious PDF — malware analysis report

Static analysis result for SHA-256 e468478c14c38a0f…

MALICIOUS

PDF

76.0 KB Created: 2021-05-29 11:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0beffe9054be2770db0623eb04530a17 SHA-1: 72e6db8414dcda8fe385d6eb59ab8781cc0ff367 SHA-256: e468478c14c38a0f521d4acd42b6f8cb010c43220f987cd1155aedc7812fc060
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm with numerous external URLs, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://ponafet.ru/wb?keyword=draw%20a%20man%20test%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382406/normal_5fec42149e46a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_605f57ce0f997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_603a715d051a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530937/normal_5fcd8f2745172.pdfIn PDF document text
    • https://fuzakeraza.weebly.com/uploads/1/3/4/8/134848422/8794932.pdfIn PDF document text
    • https://nosodelutota.weebly.com/uploads/1/3/1/8/131857544/b1baad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_603f01ff78db5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500910/normal_5fe2c1df2aa98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_604fbe38530ab.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/8601aae51d9c6e.pdfIn PDF document text
    • https://dizegixevovule.weebly.com/uploads/1/3/4/5/134576191/8873653.pdfIn PDF document text
    • https://lutapusudifo.weebly.com/uploads/1/3/1/0/131070527/5579119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496193/normal_604065b518af4.pdfIn PDF document text
    • https://zimekepipo.weebly.com/uploads/1/3/5/3/135351260/kewedufimuwofaj.pdfIn PDF document text
    • https://vukisopir.weebly.com/uploads/1/3/0/7/130776420/7a30e1a8.pdfIn PDF document text
    • https://doxavigefixo.weebly.com/uploads/1/3/5/3/135391607/waridasuriduxudinir.pdfIn PDF document text
    • https://jugotazotezolut.weebly.com/uploads/1/3/5/9/135973864/2d5b061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_5ff3d34f3096d.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/5e2a71a9-7b1e-4642-bc67-921cc45aaf0f/52296708835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6cb420-65dd-4006-a8db-9799b36e172d/apex_digital_40_inch_tv_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c094de3-2669-41ed-a406-3d285bfdf27f/tituxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1d270c-53dd-48d9-abd3-638430fb6844/97846464166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/926bac0f-012f-45e2-b28d-19a185e7b218/17668263646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e05dba4-00e0-42e6-a466-a567e9c2f626/the_end_of_evangelion_movie_poster.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_off0000ebb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB0 5248 bytes
SHA-256: 86eba52d8bcb97c7f8d9d87f4662bfd86b3d9462b6898c77ab53fc9c0f1a373f
font_01_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 10792 bytes
SHA-256: ca3e29570af32ed598a8827744c628d0be65e4b9722bf7841d4c978816b04c25