Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4c7dae7164987b…

MALICIOUS

PDF

79.6 KB Created: 2020-11-13 10:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43105fa936fcae48c12cf2eeabbb1543 SHA-1: 6eda0776eecbc485210398c419d8d18f8fb0a893 SHA-256: fc4c7dae7164987bcdb01533a5865f241f42409c6b5d3618d7a449ca19068f0b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The primary URL, 'https://traffking.ru/123?utm_term=hacked+games+google+sites', indicates a lure related to gaming and potentially phishing or malware distribution. No scripts were extracted, but the PDF structure and numerous external links strongly suggest it's designed to redirect users to malicious content.

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://traffking.ru/123?utm_term=hacked+games+google+sites
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.pdf
    • https://cdn-cms.f-static.net/uploads/4389581/normal_5f9075361c492.pdf
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f8949a85ea12.pdf
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5f9e4b8d62ccd.pdf
    • https://bimonodinedijov.weebly.com/uploads/1/3/4/6/134697137/lerafifiluda_sajuxesulekubaw_raned_tobukefu.pdf
    • https://bavopubenexe.weebly.com/uploads/1/3/4/6/134678362/7855231.pdf
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f98a605b4823.pdf
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/kifuxe_kugesixog_dagudomovan_zumawixuritut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c00b9254-4bce-4ba7-9111-bbb6b839dbb0/zaxuwu.pdf
    • https://s3.amazonaws.com/farowug/46261602423.pdf
    • https://uploads.strikinglycdn.com/files/d79dbd73-f15c-403e-a569-6ff7399dcc29/pulefazinudam.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_off0000fcae.bin
6d17334568e2e73917fc54f462646aaff76e697818e78017c0f87ac3dfeaec98
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAE 5188 bytes
font_01_sfnt_off00010e44.bin
1355dd6f743093d16347ba31602ac61d388e4518035138e004632d36b0edb30d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 10420 bytes