Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddaf748ec9b52857…

MALICIOUS

PDF

77.6 KB Created: 2021-02-23 04:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a4bfbe7558f6c4ff2cf65de67538f86b SHA-1: 88990b94938b788dd13efe11973bb72a3eaa0409 SHA-256: ddaf748ec9b52857bedee6215b44f53a6d6d988472c6c4219a713af9ee6cd327
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that mimics a search engine result, likely intended to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=what+are+the+characteristics+of+a+good+teacher PDF link annotation
    • https://cdn.sqhk.co/jigitovewuk/hglRiiN/merchant_services_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/kgdgcgg/what_animal_are_you_buzzfeed.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/jcWWge6/78474012130.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/ic7he0b/didatijubapupatiluwobidid.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/LLdhigh/9738422685.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/Zj7UKjf/download_game_vr_thrills_roller_coaster_360.pdfIn PDF document text
    • http://fesifula.22web.org/puzonokuxuw.pdfIn PDF document text
    • https://cdn.sqhk.co/nudabesawi/6tDimhj/68846905702.pdfIn PDF document text
    • http://gabofovopajojo.iblogger.org/imperative_form_german.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/jejenhi/bovugudiwovijoku.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/ac6aQOn/car_racing_games_3d_online.pdfIn PDF document text
    • http://nufudotaruja.iblogger.org/adam_joan_film_video_song_free.pdfIn PDF document text
    • https://cdn.sqhk.co/livisade/ijahjgi/links_to_get_free_gems_on_episode.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/kbhctcG/66180160120.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xitemefunugege.epizy.com/loken.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/masilolijabidajisurasotof.pdfIn PDF document text
    • http://zifotefafometa.rf.gd/arjun_reddy_tamil_dubbed.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_off0000f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF330 5264 bytes
SHA-256: eb6e74abd6e027f191b1815c64f136cb1d3628bc4896bfb4d424ac1b243131bd
font_01_sfnt_off0001051e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051E 10444 bytes
SHA-256: daf35f5c5f347cd1ef0a213d3d9d301c5b9b1dbe38cdd77a5a3870afbb1b3881

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