Malicious PDF — malware analysis report

Static analysis result for SHA-256 70080388d7a6233e…

MALICIOUS

PDF

67.2 KB Created: 2021-02-18 21:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79166e730a7c74a473f11be09e8647cd SHA-1: 9e4030d5d1602702ff3d30e1c1e383895d577d56 SHA-256: 70080388d7a6233ed0bf34c8580901b4dd3fc08905f5f7d68dd222429859a212
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable hosting, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content.

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://seumenha.ru/strik?utm_term=how+to+pair+big+blue+party+speaker
    • https://cdn-cms.f-static.net/uploads/4386622/normal_601ee5f65e632.pdf
    • https://cdn-cms.f-static.net/uploads/4392195/normal_600e0b5e470f2.pdf
    • http://olymptrade.buzz/abhishekam_movie_video_songs_freetd707.pdf
    • http://nakrutkavk.site/jilazikusunal2g2zk.pdf
    • http://mini-cam-v2.club/d-link_dir-655_manual_portuguesd9k6j.pdf
    • http://itnegozio.info/benson_ken_worship_medley_video9xu5d.pdf
    • https://static.s123-cdn-static.com/uploads/4369665/normal_5fcb4ae150824.pdf
    • https://cdn.sqhk.co/beratinuga/ijQ8T6x/pijegivemejuvuvu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lepefi/45512967938.pdf
    • http://petejubetitoma.rf.gd/97452103881.pdf
    • https://s3.amazonaws.com/baritexovopa/33352630273.pdf
    • https://s3.amazonaws.com/sesafefanulokam/50254022549.pdf
    • https://s3.amazonaws.com/masevewi/35579281089.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_off0000c6cc.bin
a10fc89388a3fd86bb144e0579ec7449f5700f127bb5f97055e23bf925bb8b7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CC 5348 bytes
font_01_sfnt_off0000d91b.bin
386bccb92e3200246bc9bab1129aa637812d108f4edc1ef391afdce4639e42dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xD91B 11224 bytes