Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffa536a0838d084…

MALICIOUS

PDF

76.8 KB Created: 2021-03-03 11:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 51de2c776810e85ea273dd222579b997 SHA-1: 202f233cc8f88dd9af2122447f3846689a05e1cd SHA-256: 7ffa536a0838d084ba027afa0ebb94928f59b6c7f90997f8b1e6bf93e7490a0c
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect the user to a malicious site.

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://jacksth.ru/123?utm_term=what+is+westinghouse+tv+code PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414869/normal_6007960dce814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527357/normal_6024971e286ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5fd6f1e19b844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60145e0d4af39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450719/normal_601de8422f2e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423427/normal_5fe95a14f3f79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501632/normal_5fff79a497cd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425760/normal_602804a532f38.pdfIn PDF document text
    • https://cdn.sqhk.co/lewuravasu/jdjdjh7/unduh_game_gang_war_mafia.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/rumezo/32512690063.pdfIn PDF document text
    • http://tojizevujodi.rf.gd/honda_rebel_1100_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/descargar_imagen_iso_windows_7_64_bits_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/gedumoromulobovijofafube.pdfIn PDF document text
    • http://xenuduximowub.epizy.com/best_books_on_change_management_2020.pdfIn PDF document text
    • http://xuwanozofugis.epizy.com/93228375455.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_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 5240 bytes
SHA-256: 7a63a28bbb7ef7058b3cade1f494efbeacbd50b52738f87d2d76ffaccbe0babb
font_01_sfnt_off00010144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10144 10932 bytes
SHA-256: c844181b6c9c112a7a9a71041cb9e52519af301dddd0d354155d3dcb48c21f0d