Malicious PDF — malware analysis report

Static analysis result for SHA-256 a712bdbb1c8054f1…

MALICIOUS

PDF

90.7 KB Created: 2021-04-19 13:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 54ad707a235f00350609502cb495a048 SHA-1: e040c8b2156ed8ed0e14572a2f480748a86cdc8e SHA-256: a712bdbb1c8054f118e81001d6d968573851c440d9b9fecbcc598d93d97f94a9
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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=when+grizzlies+walked+upright+theme PDF link annotation
    • http://bavimobuxadu.medianewsonline.com/84698361325.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/6.0_powerstroke_oil_cooler_replacement_torque_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/mozejipakas/ahhwhgC/36153538982.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/how_well_can_you_follow_directions_worksheet_united_states.pdfIn PDF document text
    • http://fuxezaboxekave.scienceontheweb.net/tatalaksana_atresia_esofagus.pdfIn PDF document text
    • http://zomewegi.iblogger.org/68994802841.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/dbThbge/52332163759.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/ijidheY/nuzanomokekuwilaba.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/65834921252.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/sm8ij98/wish_you_were_here_incubus_lyrics_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/tilekixu/Bfijggf/maridhas_answers_website.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/canon_pixma_mx432_change_ink_cartridge.pdfIn PDF document text
    • http://dutusejutax.22web.org/olivetti_lettera_32_ribbon.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/how_much_does_an_indian_roadmaster_cost.pdfIn PDF document text
    • http://takaweri.mywebcommunity.org/sasol_bursary_2020_application_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/north_oregon_coast_fishing_report.pdfIn PDF document text
    • http://vujadexofon.atwebpages.com/tabolofejufawigal.pdfIn PDF document text
    • http://losobome.rf.gd/sudufekalutofidopa.pdfIn PDF document text
    • http://xowuzaxu.onlinewebshop.net/botany_practical_book_for_msc.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/vonoropunod.pdfIn PDF document text
    • http://zugiwonurubenaz.epizy.com/formal_shoes_dark_brown.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/7955012348.pdfIn PDF document text
    • http://regipegor.rf.gd/zubuxasarilotalu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AB 5592 bytes
SHA-256: b8d67f5e8294f595ba6bc638020590199c4c3585321e57c650122c7f3710d232
font_01_sfnt_off000139b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B3 10500 bytes
SHA-256: 3e2b7210505322418247c7111cd7927a60beac1ae7b1d140b34d089c3f9d1f27

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