Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a80e2c6297930bf…

MALICIOUS

PDF

76.4 KB Created: 2021-03-31 18:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3d076ded451120e2746bddbc825e8b1b SHA-1: 243de66d596db2dc2a1b1aa612176b5115f1b43b SHA-256: 2a80e2c6297930bf20670c05aa3f08a76e782cec975b7a58f191d94be97a00d8
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to printer setup, directing users to a suspicious URL. The presence of many links suggests a link farm used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/strik?utm_term=hp+8600+wireless+printer+setup+mac PDF link annotation
    • http://fuvesozufinefi.medianewsonline.com/kupuse.pdfIn PDF document text
    • http://jazulivorif.iblogger.org/senazepuralomijemexuba.pdfIn PDF document text
    • http://jogusefuloxavoz.iblogger.org/fender_mustang_lt25_combo_guitar_amplifier_review.pdfIn PDF document text
    • http://nidomamedop.22web.org/area_of_circle_segment_worksheet.pdfIn PDF document text
    • http://jiwitoletazadag.iblogger.org/materialize_design_templates.pdfIn PDF document text
    • http://gisowutuxa.22web.org/google_classroom_2020.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/dapanelamawagama.pdfIn PDF document text
    • http://lozejokewoj.22web.org/biwuvipomazikug.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/kabovatosijozexebugizub.pdfIn PDF document text
    • http://kikifikoxije.mypressonline.com/nubuvuv.pdfIn PDF document text
    • http://pakatisijelu.iblogger.org/tuwovug.pdfIn PDF document text
    • http://tigefezatolipeb.iblogger.org/bulerejetazeku.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/wazorixekunafob/79397011063.pdfIn PDF document text
    • http://dedenolusurefig.epizy.com/dokatudevelid.pdfIn PDF document text
    • http://razafif.epizy.com/47813318546.pdfIn PDF document text
    • http://balubusepebibi.rf.gd/anomalias_congenitas_renales.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/ap_chemistry_acid_base_reactions_worksheet_answers.pdfIn PDF document text
    • http://xogonat.epizy.com/30th_anniversary_party_invitation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/android_games_free_full.pdfIn PDF document text
    • http://zofududa.rf.gd/gaketojozivojolixik.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/xixil.pdfIn PDF document text
    • http://jefesuzi.epizy.com/bonafide_certificate_for_nsp_scholarship.pdfIn PDF document text
    • http://wimanugobupu.epizy.com/64174380204.pdfIn PDF document text
    • http://xafofeb.epizy.com/automotive_anti_lock_brake_systems_abs_haynes_techbook.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_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 5620 bytes
SHA-256: 81b506eaa4d324c15d13b46bb85a06966830be4cb1fb46c86bf341964d48b617
font_01_sfnt_off0000ffac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAC 10652 bytes
SHA-256: 8ab43fb18f3dec6039f2294f7fcf3752ddf375910ac9250bf98aa714df4562d3

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