Malicious PDF — malware analysis report

Static analysis result for SHA-256 f474cf8d6a36c7e2…

MALICIOUS

PDF

78.4 KB Created: 2020-11-13 00:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46d5ab78a2a2322654276d0b14d7b460 SHA-1: d785a8674c720ef909d011c9d1d3a3fca94142ef SHA-256: f474cf8d6a36c7e2948c02765ee99fdcb405779a8e87bef03ccf7936f3d6c6ef
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://traffnew.ru/strik?utm_term=skyrim+race+mods+xbox+one', suggests a lure related to 'Skyrim race mods xbox one'. The presence of ClamAV detection and ML flagging further supports its malicious nature, likely for phishing or distributing further payloads.

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://traffnew.ru/strik?utm_term=skyrim+race+mods+xbox+one
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/botolaj-wilepegavifef-zebud-sebapuwibin.pdf
    • https://cdn-cms.f-static.net/uploads/4381091/normal_5f8b5b93d47c0.pdf
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8fe3cd5b010.pdf
    • https://cdn-cms.f-static.net/uploads/4428043/normal_5faa0ab6291d8.pdf
    • https://cdn-cms.f-static.net/uploads/4373769/normal_5f8d0e5b89aa4.pdf
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/vozetovuxukelul.pdf
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/sokete-toliri-jukoxanokomule-fodogoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zomuzigo/paladin_legion_mount_guide.pdf
    • https://uploads.strikinglycdn.com/files/641a0f8e-d627-40a4-ab34-8dac9c515798/70521414669.pdf
    • https://s3.amazonaws.com/fenatagazise/ganpati_bhajan_pagalworld.pdf
    • https://s3.amazonaws.com/muwemivumazulax/exceptional_lives_9th_edition.pdf
    • https://uploads.strikinglycdn.com/files/78637940-9179-4ce4-95f1-dfd9a24a2028/54053929762.pdf
    • https://s3.amazonaws.com/bepukuba/babew.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_off0000f5cd.bin
56fd1179967fb2d549daf0dbda1a2e9a367a1da428271f7f2ae5dbe861b44e19
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CD 5532 bytes
font_01_sfnt_off0001088b.bin
e368567f6beec153a35d99be110765fa9db48b23ae660211c1179fdb546c6020
pdf-font-stream PDF embedded font (sfnt) at offset 0x1088B 10644 bytes