Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e663fdf742595cf…

MALICIOUS

PDF

72.2 KB Created: 2021-02-25 03:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 64a71bd1340694f85cfce02fa3f9fbf4 SHA-1: 405141cdb529fee45752dcbcbc9e8f8170e6b1b0 SHA-256: 2e663fdf742595cfd045d8683cc7b4d1d620eb8ec0e8b9f9d14efac7f1bee6f6
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and potentially malicious hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=ktm+990+smt+owners+manual PDF link annotation
    • https://cdn.sqhk.co/dukoredod/jgnhbgi/old_tv_show_trivia_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/Lja5yha/amazon_a_to_z_claim_policy.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/80112936270.pdfIn PDF document text
    • http://xupevagadozojad.22web.org/who_is_playing_nikolai_in_shadow_and_bone.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/how_to_write_a_reflective_essay_sample.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/sunupumizomekalotog.pdfIn PDF document text
    • https://cdn.sqhk.co/fotusonetagu/spjdChc/gaturupozevud.pdfIn PDF document text
    • https://xozipirun.weebly.com/uploads/1/3/5/3/135324749/vimobulokegi_ruratosubazi_ruduruje.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/hgrjfcX/free_offline_vegas_slots_casinos_chicken_dinner.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/Ejjgfpw/sowupasoleduxa.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/Ihjijif/nomap.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/2824286.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/62074592548.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagelenobom.epizy.com/tnstc_express_bus_driving_game_apk.pdfIn PDF document text
    • http://natetagawavitir.rf.gd/68812474594.pdfIn PDF document text
    • http://radagosedapisat.epizy.com/cavaleiros_dos_zodiacos_omega_dublado.pdfIn PDF document text
    • http://wadogoded.epizy.com/levozixudiwosewejosefaz.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/2126909938.pdfIn PDF document text
    • http://pomagupivedib.epizy.com/votepewojigisipegumigit.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_off0000db61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB61 5192 bytes
SHA-256: ec7e2305c4d8ebbcb1b491f1a22b11af597db14806a1d741e3d0e09d03389029
font_01_sfnt_off0000ed05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 10916 bytes
SHA-256: b9049f0420995569af22abae0cf532b0b205adc4cf02046ddce7dde4a82488d0

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