Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce0a6d41ba13310…

MALICIOUS

PDF

71.6 KB Created: 2021-03-04 05:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4f3dc104714d84d97431fb7ff7d59fca SHA-1: 929e8974377f737024598d75f2e16c7dd0b33ffb SHA-256: 8ce0a6d41ba133101b6f33c680b47225732d06a684599f79dd9174bd591dc96e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=liftmaster+8165w+owner%2527s+manual PDF link annotation
    • https://mixidesurujof.weebly.com/uploads/1/3/4/9/134902607/96fe05.pdfIn PDF document text
    • http://rentline.pro/34072269512od8ov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368962/normal_60083098354d3.pdfIn PDF document text
    • http://about-fb-support.com/xurunokok5fmq.pdfIn PDF document text
    • http://1xbets-regs.site/ditefafagotoguzupusoz9h5nm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425514/normal_5fc73108c13df.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/tipeliz-modonobapobugem.pdfIn PDF document text
    • http://reetodo.online/137871868320i9rf.pdfIn PDF document text
    • http://qwertyujg.xyz/golds_gym_410_treadmill_belt_adjustment71pov.pdfIn PDF document text
    • http://umdtheatre.ru/13616853588q9oep.pdfIn PDF document text
    • http://redtea.space/28532027404ogmwo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugikan.epizy.com/avatharam_telugu_movie_songs.pdfIn PDF document text
    • http://jixolekajes.rf.gd/60562562741.pdfIn PDF document text
    • http://bawilifugoxak.epizy.com/47795741703.pdfIn PDF document text
    • http://foretoxute.epizy.com/como_ser_policia_local.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AD 5504 bytes
SHA-256: 734a313fd4c9bc1899af3203a9ef8ecb5d4f17769f69eed4a88fa754db27c665
font_01_sfnt_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 12080 bytes
SHA-256: 68fb24bd35231091595cdd90542d913630ed860bb8bd16570d8e8db27e6b61e5

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