Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce29d51664dbfa6b…

MALICIOUS

PDF

68.3 KB Created: 2021-02-10 09:38:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 28bc2b7775288708962c3e69271371ce SHA-1: f934b61f8c22eb3a05291d1c25ee854303b60770 SHA-256: ce29d51664dbfa6b06dc11ec7fec1a1c6324038b5328de51035a14a5ae3a1481
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting or unknown reputation sites, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=landforms%20worksheets%20for%20kindergarten%20pdf PDF link annotation
    • http://rozivoladavabog.iblogger.org/commercial_vehicle_accident_report_form_template.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/5I5igSl/past_future_song_mp3_download_djpunjab.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/hc3jiEY/physics_puzzle_game_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/dyxghii/18113555528.pdfIn PDF document text
    • https://cdn.sqhk.co/nugofonavuf/hjOHTij/jumitagotome.pdfIn PDF document text
    • http://afracheat1.xyz/801245791196j56w.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/OjbKJlo/easy_flower_pot_painting_designs.pdfIn PDF document text
    • http://sibuvre.com/volcanic_rock_crossword_puzzle_answerrtn98.pdfIn PDF document text
    • http://smirno.life/fagixizodubarejakexonipild69u.pdfIn PDF document text
    • http://koteyarn.moscow/lexis_audio_editor_apk_mirrorkkda8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469135/normal_600ce463e43a4.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/hdjjsj0/cruise_companies_ranked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489716/normal_5fc81321b0b12.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/Fjihijc/wolf_the_evolution_online_rpg_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5feb2d457b940.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muzezal.rf.gd/android_assets_file_object.pdfIn PDF document text
    • http://xumusuriwo.rf.gd/pathfinder_kingmaker_magus_sword_saint_guide.pdfIn PDF document text
    • http://vavukewapufusa.epizy.com/formation_animaux_en_suisse.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_off0000cea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA7 5520 bytes
SHA-256: 038fa3ce2115d58c43355521679e9341d7eaa58fd08502ca98f6c3b3186b52c1
font_01_sfnt_off0000e162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE162 10048 bytes
SHA-256: d928d1b0a8ea71a15cc7829f6a2d83de580a9f77ed6d2f481724b2a0edb12616

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