Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54ac81c7f327a98…

MALICIOUS

PDF

66.1 KB Created: 2021-02-05 11:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fafb43daef92510537f74a681bc76bdf SHA-1: 22e36fdba8e235ae3f7f72de9f1b6d221e95ad72 SHA-256: e54ac81c7f327a98ed6f905e9112f7c3358a4a46493f9dcf4dbd247012bc5b69
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/aws?utm_term=liebermann+gargoyles+sheet+music PDF link annotation
    • https://cdn.sqhk.co/kaxonavi/8W7JtNi/17922104375.pdfIn PDF document text
    • http://digtalcaliper09.xyz/acknowledgement_format_thesiszwr7y.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/gbhhrig/76794546071.pdfIn PDF document text
    • http://1eyvgo.xyz/66988495066p87dm.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/KhfiiHT/99460386293.pdfIn PDF document text
    • http://ubsvp.com/jelujujo8syam.pdfIn PDF document text
    • http://ctyr.ru/609771197386t6fi.pdfIn PDF document text
    • http://italia-doc.fun/vygotsky_theory_of_cognitive_developmentd8tiz.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/bMhggeI/87662077932.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375907/normal_5fe2e09f6452a.pdfIn PDF document text
    • http://modernstyle.pro/900486293704u869.pdfIn PDF document text
    • http://forpost-electrica.ru/download_slither_battle19s4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_5fd7c31f04892.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/tutasujal/cash_payment_slip_template.pdfIn PDF document text
    • http://navibizo.rf.gd/bee_buzzing_sound.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_off0000c5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DE 5396 bytes
SHA-256: 4daa5ca85cb1d785213b4f2835cd77c23b42db94ce85dbb8766a5474ba7d0bfe
font_01_sfnt_off0000d815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD815 10372 bytes
SHA-256: 47d9d1cfb88aa1a9e0321e3156932a960f8794b8dca82275b506ab48125c39b3