Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d66303536fd699…

MALICIOUS

PDF

74.5 KB Created: 2021-03-07 15:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1153520ac7b52a900e951e7ff491207a SHA-1: 9c2beba016fbf6939a1d53b24e585a3a39e368d2 SHA-256: 17d66303536fd69997a339e3caa0ef2214e0e80ef4acd50bf90a4c1995a96eab
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://dafemum.ru/strik?utm_term=johnson+9.9+outboard+motor+cover', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create documents for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=johnson+9.9+outboard+motor+cover
    • http://eeuuurrrrr.space/chess_life_magazine_downloadxrfss.pdf
    • http://zibanozoxepezu.iblogger.org/5965250783.pdf
    • http://fopekoriw.sportsontheweb.net/boxing_defensive_techniques_for_beginners.pdf
    • http://securityverifiedservices.com/utilitech_space_heater_instructionsz90lp.pdf
    • http://faceit.su/lugosumutosakodatheoab.pdf
    • http://aires.fun/how_much_is_ddp_yoga_on_demandplyob.pdf
    • http://rolapisi.scienceontheweb.net/capsim_for_dummies_2020.pdf
    • http://tcerkovniekupola.space/enter_the_kettlebell_or_simple_and_sinisterb7jl3.pdf
    • http://volosaty100.xyz/sea_of_monsters_summary_moviexym22.pdf
    • http://jobediniberine.scienceontheweb.net/career_development_individual_development_plan_examples_for_employees.pdf
    • http://masito.space/85769665300288y0.pdf
    • http://zatawonilar.iblogger.org/wedavezegeg.pdf
    • http://mebutef.22web.org/alkyl_chain_conformation.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_9746e086924946638a7cb7b711a93fd4.pdf?index=true
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_567786b41dca4e3185a9b8b6fb7a5d16.pdf?index=true
    • http://pigozezidum.rf.gd/landscape_bond_form.pdf
    • http://viwuwijagabote.myartsonline.com/30610383107.pdf
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_b7507c9ee40c44c392b6a610c742b35c.pdf?index=true
    • http://dawiwafawuz.epizy.com/15909800340.pdf
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_68670c94643f4f3790cca59403bc1774.pdf?index=true
    • http://ziwemasux.myartsonline.com/4th_grade_grammar_quizzes.pdf
    • http://kimawawasero.onlinewebshop.net/jack_reacher_never_go_back_netflix_country.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_off0000e817.bin
cbef38ed700d827cb5c11284e7a5ed77368546442508116deb45767797c85706		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE817 5524 bytes
font_01_sfnt_off0000fabc.bin
f7634ca7c1e566d3eae6f64a839790946f639c7290f88ab6db488f4c4a65b72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFABC 9876 bytes

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