Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03eb725d4999c44…

MALICIOUS

PDF

66.0 KB Created: 2020-11-26 02:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3191f949ffbbde966c8d243bf7f67c08 SHA-1: 91674ebb3ebbf911edb92713a76a285561490cda SHA-256: a03eb725d4999c44297738cf4c0768e7aee21d3e3653260db29b8247bb07618f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. Static analysis heuristics and a machine learning classifier flagged this PDF as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL, 'https://trafffi.ru/strik?utm_term=touareg+service+manual+pdf', is likely used to redirect the user to a malicious site, potentially for phishing or malware distribution.

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://trafffi.ru/strik?utm_term=touareg+service+manual+pdf
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5f9e275cecc7e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8449a9bb-d603-47d7-b38d-5c50a40eddad/como_esta_formada_uma_molecula_disfu.pdf
    • https://s3.amazonaws.com/bupaxomu/data_analytics_course_content.pdf
    • https://s3.amazonaws.com/bizamesuwepe/gatesujuba.pdf
    • https://uploads.strikinglycdn.com/files/52e23af3-8f90-4a37-bcbe-20edde1a07d6/muravedibasozo.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/acrobat_pro_reduce_file_size.pdf
    • https://uploads.strikinglycdn.com/files/80f762ae-3b82-48ba-872f-21366de33dec/12421653056.pdf
    • https://uploads.strikinglycdn.com/files/c3340811-848b-49a5-8556-0b1cdffeee5b/revupomafutavopen.pdf
    • https://uploads.strikinglycdn.com/files/d1d58c85-f380-4efe-8143-775a3d8897da/wyldlife_club_talk_progression.pdf
    • https://s3.amazonaws.com/fikuvine/10740605787.pdf
    • https://uploads.strikinglycdn.com/files/07580f08-3e7a-4445-9045-d9d64fad9632/pewugepidibudifefi.pdf
    • https://uploads.strikinglycdn.com/files/87be8d1c-69ff-48ad-8146-6c159288a235/tarjetas_navideas_para_preescolar.pdf
    • https://s3.amazonaws.com/wozoxub/dotifadikobidoro.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/90177111700.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_off0000c43e.bin
14c77f4ef997f9824486a169fdf8dfce630c858e01a3e48bec1333fa9ba4c182
pdf-font-stream PDF embedded font (sfnt) at offset 0xC43E 5484 bytes
font_01_sfnt_off0000d6dd.bin
5cd8144d917b026123812efb0e3198c4a200a2bac946c97d41dab3f6a95e3bb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DD 10820 bytes