Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9db9aa54358719…

MALICIOUS

PDF

84.8 KB Created: 2021-03-03 13:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 03acfd88ae5c31bc0bcd41cc0fba5bcb SHA-1: 4af6286ceb36bcf84cef376f32295c811ea2b973 SHA-256: 6c9db9aa54358719e469630fa9fe04d38c5717017938d07368a174701197bf11
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing malware. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wb?keyword=what%20is%20the%20fp%20designation%20on%20illinois%20license%20plates PDF link annotation
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/5711066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443576/normal_5fd65105415d2.pdfIn PDF document text
    • http://rakakap.iblogger.org/pan_card_application_form_for_minor.pdfIn PDF document text
    • https://wijinopupog.weebly.com/uploads/1/3/5/3/135323990/4281573.pdfIn PDF document text
    • https://vediturano.weebly.com/uploads/1/3/4/8/134886327/dedafewiloxiti-ganinawifetilo-sanefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501385/normal_6024612f49bf3.pdfIn PDF document text
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/9b9a1e69a51fb1.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/5117661.pdfIn PDF document text
    • http://walkover.me/definitions_of_educational_psychologye1zke.pdfIn PDF document text
    • http://vanlit.ru/jotaledavugaxumufawapivamzv9y8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5fcbf1660dee1.pdfIn PDF document text
    • http://899themes-demo.ru/life_without_principle_henry_david_thoreaudiirg.pdfIn PDF document text
    • https://pefobasor.weebly.com/uploads/1/3/4/1/134131397/gepije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_5fe6e9e0f028e.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/rimepusox/wellcare_of_kentucky_prior_authorization_form_medication.pdfIn PDF document text
    • http://tasaronusofake.rf.gd/canberra_times_sports_submission_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/biwepisoxebesoripoteb.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_off00010e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1A 5332 bytes
SHA-256: 288ae310b453c810a628e72af91fcc12a53e7a366b85d116b0c66aabaffde6a2
font_01_sfnt_off00012052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12052 10968 bytes
SHA-256: f03233bfaf6846f83033182dcbf2a317f32481fc21afa6756e1ca6142e936ed3

Open this report in the interactive analyzer, or submit your own file for analysis.