Malicious PDF — malware analysis report

Static analysis result for SHA-256 2929ca76ce01ec60…

MALICIOUS

PDF

78.6 KB Created: 2021-03-18 08:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f48d1598be8c2ff1a3381fe9f3223cc5 SHA-1: 15ef2e2debec85f7ea35ff955b9cf1db03f64b12 SHA-256: 2929ca76ce01ec6065bf8725d2d4979d5864718fcb07851aba5e5034984202d6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://zajinet.ru/aws?utm_term=what+is+the+pill+amc+875+125 PDF link annotation
    • http://wowmarket.info/alien_isolation_mission_5_map56ieq.pdfIn PDF document text
    • http://ehaberdevlet.com/why_does_inbreeding_cause_problemsmk0sk.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_to_change_s9_charging_port.pdfIn PDF document text
    • https://xasirazabad.weebly.com/uploads/1/3/4/6/134699738/morolaselamuvigel.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/wogufutojojobef.pdfIn PDF document text
    • http://bumaga.bz/43326856408t0l1j.pdfIn PDF document text
    • https://bonitolopulako.weebly.com/uploads/1/3/1/3/131384654/ab90fd4f29be2d.pdfIn PDF document text
    • http://extrameets.fun/ge_dishwasher_timer_repairg2wc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_603567393067f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_6052ea924782d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480584/normal_60337d2cf21f8.pdfIn PDF document text
    • http://botefedej.sportsontheweb.net/free_printable_calendar_june_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391335/normal_60064c065005f.pdfIn PDF document text
    • http://vofigasu.medianewsonline.com/20052647342.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/6853766.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/best_convertible_car_seat_2020_safety.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vapewokadovusa.myartsonline.com/central_venous_catheter_insertion.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/poposeboza.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/dojex.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/how_do_i_connect_my_bose_wireless_headphones_to_my_lg_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/68569499821.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/jinekigovibeg.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_off0000f643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF643 5672 bytes
SHA-256: 06125f370163256c59a3dadb8f7772817128287a8b551e3aa37f55e97f724540
font_01_sfnt_off0001098f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098F 10440 bytes
SHA-256: 42d53f4d11920fcb27a63bc7371f2019c12677790c997e3699d3fc53df2b8172

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