Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab1794c1f016dff…

MALICIOUS

PDF

73.0 KB Created: 2021-02-20 05:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 67b3f648e0edefa456ed1a007b5ba607 SHA-1: 69e7c7d0050602aef2580a145d49c7db96a4fe02 SHA-256: 2ab1794c1f016dff4235ec2d7cdf76dd920671c7e376a1e995b0db1046fb1672
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting it's used for phishing or to host a malicious payload. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a book title, which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=pharmacotherapy+a+pathophysiologic+approach+9th+edition PDF link annotation
    • http://cookwellbakewell.com/roadstar_navigasyon_gncelleme_program_indirjf0fj.pdfIn PDF document text
    • http://xuguxujew.iblogger.org/define_agency_theory.pdfIn PDF document text
    • http://jobs-ingenieur.best/medusajabakipobedusupcut.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/polexebuj/aviation_herald_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/phpspreadsheet_create_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/46593568970.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/gifinijeluzabim.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/tools_required_for_android_game_development.pdfIn PDF document text
    • http://vaxokepa.rf.gd/capacitor_ceramico_101_datasheet.pdfIn PDF document text
    • http://besikinugid.epizy.com/90098514751.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/bulova_accutron_chronograph_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/lafukinuvoma.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/19582449386.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/lafuxumuxaliliduloduv.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_off0000df32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 5748 bytes
SHA-256: 956bdf968c8edb2449d56e499638ca280c68d40f08c8a55fa1e382aac5d0a8cd
font_01_sfnt_off0000f296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 10496 bytes
SHA-256: defe0006b7a104b129f8dc74bf296dc43b3ad1392da333cd0aefcd2aaeefb23a

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