Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a6400df36d0c76…

MALICIOUS

PDF

72.7 KB Created: 2021-02-27 08:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f68e7e0a4a8ba29a2401945cdbd6af13 SHA-1: 202d7cafc689dbdf071d4043c7b230e76ea7c6b9 SHA-256: e9a6400df36d0c76c13c52854422197cee8c733d8be086ee427ee72417e024c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://dugedepap.ru/strik?utm_term=delonghi+pac+a120e PDF link annotation
    • https://cdn.sqhk.co/tebefaravuz/Lhegc66/nail_salon_near_me_open_till_8.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/jhygehe/tegozojuzebaval.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/igiEkgj/romorupenufofegumezinu.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/Aih2gei/61154442911.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/hc1picz/jajubiragimuji.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/hbhcjhl/gartner_hype_cycle_example.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/gcFzVic/hot_wheels_id_arkham_knight_batmobile.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/27TibXy/dr_driving_game_online_play_now.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/kezaxafi.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/dgcgerf/55636239617.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pemukusa.epizy.com/netbeans_c_c_development_pack.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/85985755262.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/puxigozogeridegonomipaw.pdfIn PDF document text
    • http://wosunitiguzivef.epizy.com/20236443169.pdfIn PDF document text
    • http://xajokaxakubif.rf.gd/waste_of_time_video_song.pdfIn PDF document text
    • http://xagejinije.rf.gd/budifaxo.pdfIn PDF document text
    • http://dipijiz.epizy.com/billy_ocean_greatest_hits.pdfIn PDF document text
    • http://wiwazexetupa.rf.gd/what_is_the_reggio_emilia_approach_to_early_education.pdfIn PDF document text
    • http://sitowofe.rf.gd/zatasow.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_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 5244 bytes
SHA-256: 9bb6440ebd54e6e9f0ae5a1d84a5b0238f209942d2c5cb59dab630f62cd7e753
font_01_sfnt_off0000f12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12B 10884 bytes
SHA-256: 01f6a430e2ad489eff10a6339dcdb6b1e87dc966baeaf01fb20b50aa75c228e3