Malicious PDF — malware analysis report

Static analysis result for SHA-256 6489c9fdbe4c169b…

MALICIOUS

PDF

65.0 KB Created: 2021-02-07 01:07:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2a681a5e128f43a83e8cef0d4f8a482e SHA-1: 6cf24d11a25cfdfc913b6c9928eb5fb4d3f77820 SHA-256: 6489c9fdbe4c169b513e40c4d06e589f5d5b7047bea3930e74c713429c3f9889
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous external URIs pointing to disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain keywords related to a game guide, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wb?keyword=arma%203%20exile%20noob%20guide PDF link annotation
    • https://legunumazonum.weebly.com/uploads/1/3/4/4/134455594/novavuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446029/normal_5fde1f160c2bf.pdfIn PDF document text
    • https://reseviris.weebly.com/uploads/1/3/5/4/135400779/ganixofe_fuvafilo.pdfIn PDF document text
    • https://kikurexabo.weebly.com/uploads/1/3/5/3/135325422/4ab647b.pdfIn PDF document text
    • http://hurleyshamburgers.com/calendario_2020_por_mes_para_imprimir_gratis76c1n.pdfIn PDF document text
    • http://normab-id.com/jesumebugfhi7d.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/geifgdE/bigo_live_app_video.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411245/normal_5ffc35b7acff1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368758/normal_5fc62f34cf87e.pdfIn PDF document text
    • http://vovpomnim.ru/7853179079720t13.pdfIn PDF document text
    • http://naturalm.space/pathfinder_kingmaker_arcane_trickster_sorcerer_buildi2trl.pdfIn PDF document text
    • http://nanolenka.xyz/67276250560kyyqu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kaxukok/wamax.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/fagejogur.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC380 5328 bytes
SHA-256: cbc29cc2e2a58ca4450b78e9f4dd54c1fdfd33f749c1fc4cf1c7b3bde8241e97
font_01_sfnt_off0000d586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD586 9980 bytes
SHA-256: cc3760ea93939fce6b404ea791c0c0f4c7fc482a913ca3c0911e6bc7e78cfc3d

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