Malicious PDF — malware analysis report

Static analysis result for SHA-256 8667aaf28561bf4d…

MALICIOUS

PDF

75.9 KB Created: 2021-03-25 09:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a885c65da0237fd5720abaf892674109 SHA-1: 27b4975b5f3604f7bff7215755cc50edf8f3ec1e SHA-256: 8667aaf28561bf4dab6250f63fe4ca9b9c228184c34abd314f36ace297b2b62e
96 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to citation formatting, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=chicago+style+citation+font
    • http://nanebaxexob.getenjoyment.net/tuzimaku.pdf
    • http://newipufisatag.scienceontheweb.net/examples_of_metaphors_in_tell_tale_heart.pdf
    • https://cdn.sqhk.co/wupifufexix/1Lhdsjp/68478584847.pdf
    • http://farozemirig.scienceontheweb.net/kenmore_500_dryer_not_drying.pdf
    • http://newberginvestmentproperty.com/pijosajunugovisuwuzup0bib7.pdf
    • http://defokozixeral.sportsontheweb.net/amphibian_species_of_the_world.pdf
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5ff9d4298d2ea.pdf
    • http://sisogelodaze.medianewsonline.com/97267752299.pdf
    • http://navalny.design/71096422780nqssn.pdf
    • http://prodson.fun/math_flashcards_printablesdm5f.pdf
    • https://cdn.sqhk.co/posuwumujome/zpih9hi/toca_boca_life_hospital.pdf
    • https://cdn-cms.f-static.net/uploads/4371005/normal_6051ae40c606e.pdf
    • http://vovality.club/slots_games_for_pcz8oti.pdf
    • http://faxusupovetek.sportsontheweb.net/18027808846.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e8777003-7c97-4856-a7fc-1263709e20dc/fusaje.pdf
    • https://uploads.strikinglycdn.com/files/248f34ff-09c1-4879-8817-61b868792ce5/48527840750.pdf
    • https://uploads.strikinglycdn.com/files/a8904a76-18c2-4597-8ccf-6063eed957e1/98703348751.pdf
    • http://piwolimosopobu.myartsonline.com/autodesk_inventor_2020_tutorial.pdf
    • http://wizigipixe.atwebpages.com/33647977816.pdf
    • http://timojodabemisux.myartsonline.com/activated_carbon_adsorption_mechanism.pdf
    • https://uploads.strikinglycdn.com/files/3270994f-c31a-414e-aa8a-893e0cdf0c50/master_airbrush_model_e91_instructions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed9e.bin
26ef2f09ffb34cc0e3a617ce13738bae41af00d600649be4073773d643830c1c
pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 5052 bytes
font_01_sfnt_off0000fedb.bin
296afc6e064e45a9a78ca5621b2762baee4a583a6c504344a170eb43d6d5315f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDB 10448 bytes