Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af4ddda6da2f47d…

MALICIOUS

PDF

69.8 KB Created: 2020-12-24 20:24:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc21d59d326cdc6a4f3b4169f11750ae SHA-1: d76dc10645757ca91426493fe7244e5286683090 SHA-256: 6af4ddda6da2f47d618830e6c2debcbd5ce35a490f68a516cb862abad9a83956
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to 'trafffe.ru', which is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, suggests a lure related to downloading 'Geometry Dash Lite PC'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing attempt.

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://trafffe.ru/strik?utm_term=geometry+dash+lite+pc+descargar
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5f8959723cd5a.pdf
    • https://cdn-cms.f-static.net/uploads/4501208/normal_5fb4a3d4f341b.pdf
    • https://pogedufofow.weebly.com/uploads/1/3/4/5/134512351/6478947.pdf
    • https://cdn.sqhk.co/zixajofazadi/qgjbhaD/60326484507.pdf
    • https://zubotovilep.weebly.com/uploads/1/3/4/5/134581484/vepul-gopoburamuju.pdf
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/nutojeda.pdf
    • https://cdn.sqhk.co/kapopajij/gjS8Uij/25765221214.pdf
    • https://cdn.sqhk.co/xibumediw/bNhjiea/6037614153.pdf
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/rixijomogev-lewusimob-nefadajefug.pdf
    • https://cdn-cms.f-static.net/uploads/4409411/normal_5f95f74898720.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ca540e9b-57e7-4f54-9298-086171bd3e56/mukimafitu.pdf
    • https://s3.amazonaws.com/rizezobabub/92105926932.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_off0000d3a7.bin
1ac7945a3b1f42e43250bba8994237eb1e9b07b01df85d9677f2e3f81997b339
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A7 5620 bytes
font_01_sfnt_off0000e69f.bin
973218dfa1dda7fa38e67d2eabea302a3abcb4bc477776cabaa32babd4253c13
pdf-font-stream PDF embedded font (sfnt) at offset 0xE69F 10692 bytes