Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac69cc746a9a001c…

MALICIOUS

PDF

73.1 KB Created: 2020-12-28 21:50:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfb51deebea95ffd14145896dc809b61 SHA-1: d0fd1ec3bab86c4da7b1cd76a43560dd4e93a60c SHA-256: ac69cc746a9a001c05aec016ab95a8e0fc1d30d22df557359368bbd2b2c58e64
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in phishing or to distribute malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a malicious intent to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification. The embedded URL 'https://traffset.ru/123?utm_term=psp+cso+games+under+100mb+download' appears to be part of this link farm, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/123?utm_term=psp+cso+games+under+100mb+download
    • https://cdn-cms.f-static.net/uploads/4459176/normal_5fd7dbb8154cb.pdf
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/ruzowidatixalul_gatobekalo.pdf
    • https://cdn.sqhk.co/wuwovodegi/jgnseha/70808808201.pdf
    • https://cdn-cms.f-static.net/uploads/4411915/normal_5f9abfb0abba1.pdf
    • https://jonapofa.weebly.com/uploads/1/3/4/6/134699055/wefafomawi-muwilonot-molavigajewuvon.pdf
    • https://cdn-cms.f-static.net/uploads/4485693/normal_5fd67476cf08e.pdf
    • https://cdn.sqhk.co/semobisugigi/ihLonG1/ganondorf_sword_smash_name.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6aacfa85-0723-4d15-b32c-8e3d31f034f3/xejepilaboto.pdf
    • https://uploads.strikinglycdn.com/files/7f9afe92-1de6-4c52-a2f1-6d002085bd57/adt_safewatch_cellguard_manual.pdf
    • https://uploads.strikinglycdn.com/files/e93f3cf1-f2c1-44ff-a1b9-4de6c13ad8e4/74873154015.pdf
    • https://uploads.strikinglycdn.com/files/94df202e-002c-4e43-9698-3649c1c5ea63/82033786017.pdf
    • https://uploads.strikinglycdn.com/files/c277e771-139a-44d3-90b7-c64eedce5afd/39617568668.pdf
    • https://uploads.strikinglycdn.com/files/726fc75c-f6ed-48e9-baa5-1dd1bfe7d77a/download_game_speed_car_drift_racing_mod_apk.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_off0000dfe8.bin
f5701a14918e8dbe0f376f25f3df72cf814634f4421396bf544a61298092bbcd
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 5820 bytes
font_01_sfnt_off0000f3b1.bin
6198be8d2f60589d8f25c7680d32cb85cee188360f4149354ca8d09a0517e539
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 10500 bytes