Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b59c504c230dee…

MALICIOUS

PDF

76.9 KB Created: 2021-04-01 14:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 32b0657d5bb6c7c515f52a9fab77a6f9 SHA-1: e9a6706bc898b1658b7ca9bac9df3b6320ffc609 SHA-256: 72b59c504c230dee730ef529a78f0d506bdba0ecbbafa598f6a179fc97579b9f
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 0.9992

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://mezovuduw.ru/strik?utm_term=harley+service+records PDF link annotation
    • http://bbflowers.net/93304599889c9n9h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_6041931644bab.pdfIn PDF document text
    • http://gosugas.getenjoyment.net/case_study_research_in_the_philippines.pdfIn PDF document text
    • http://prizinsta24.site/pubonezakasejaveszwwyj.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/jdmgcAf/photo_editor_app_for_iphone_4s.pdfIn PDF document text
    • http://koteyarn.moscow/windows_server_2012_r2_inside_outfdrx7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_6010d40e21b9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_5ffcf2ced901d.pdfIn PDF document text
    • http://shoop-fk.ru/medidas_preventivas_covid_19_en_el_trabajo19e2o.pdfIn PDF document text
    • http://glossywp.online/gate_mechanical_engineering_book_free_downloadexx0d.pdfIn PDF document text
    • http://oneitshop.pro/15606665448gadjl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_5fdad6bcdec6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467589/normal_5fd2fc398cf3c.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/fPTEP1r/adidas_shoes_white_mens.pdfIn PDF document text
    • http://amandeepsadyora.com/simisilunikilirezedekawinjvg46.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/market_research_business_plan_example.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/dhigjD1/mawijekirasufoju.pdfIn PDF document text
    • http://karaulovlife.site/timex_alarm_clock_radio_manual_t2351xo89h.pdfIn PDF document text
    • http://esagafow.fun/demezetega4v2j.pdfIn PDF document text
    • http://white-x.fun/amiga_cd32_rom_packewy5a.pdfIn PDF document text
    • http://usejus.pro/can_my_gym_still_charge_me_during_covid9c4du.pdfIn PDF document text
    • https://cdn.sqhk.co/lesebonun/oigheii/87336581732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://peruroz.onlinewebshop.net/b._com_general_syllabus.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_off0000f07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07A 5056 bytes
SHA-256: 03688fb81ea12fa627035deb968b6ae67cc01c835809998031b48d8731495641
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 10672 bytes
SHA-256: a1a240e16b7cb15d954aff5d8d65deeb23514c4801be14cfd886b3c816b64bf1

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