Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab29a0a09c49c9f…

MALICIOUS

PDF

68.3 KB Created: 2021-01-12 15:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1276de2e556c14326f697f7b1f142305 SHA-1: 72afe0d849308324725d48bd40912d168fee705e SHA-256: 9ab29a0a09c49c9f0359fa0d186f4ca2fe38bcc4f78386eaa5f328433958afcb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content, likely for distributing cracked software as indicated by the 'utm_term' parameter in one of the URLs. No scripts were extracted, but the PDF structure and URL analysis strongly suggest a malicious intent to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=nord+vpn+pro+cracked+apk
    • https://site-1173349.mozfiles.com/files/1173349/widizejulebomofipepuba.pdf
    • https://site-1178858.mozfiles.com/files/1178858/98053856177.pdf
    • https://cdn-cms.f-static.net/uploads/4476566/normal_5faedd10dc6da.pdf
    • https://cdn.sqhk.co/jepipovi/iakghFV/panoxasujidi.pdf
    • https://guxikotazo.weebly.com/uploads/1/3/4/7/134704652/697d5c3624.pdf
    • https://site-1171482.mozfiles.com/files/1171482/modern_history_meaning_in_urdu.pdf
    • https://cdn.sqhk.co/fusuzogik/ZJ6GNqT/85671266243.pdf
    • https://site-1239195.mozfiles.com/files/1239195/battleground_survival_apk_obb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/savifin/98085187547.pdf
    • https://s3.amazonaws.com/fidefofudi/banuzifegufewakazuxuxirur.pdf
    • https://s3.amazonaws.com/lovomijelun/family_tree_spreadsheet_excel.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_off0000d0a3.bin
3bf4435e2605f0724a198f431a935507c13215b6f1c80b3920b5c3aedcee1176
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A3 4948 bytes
font_01_sfnt_off0000e198.bin
f70c516d74e64ce26646afaaf3b8ba1cc87fd3c6973e19797f00f3709f05f2a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE198 10380 bytes