Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b82835951805a96…

MALICIOUS

PDF

40.8 KB Created: 2021-03-16 14:20:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efbb1a0ca216394143bdabbd88b28533 SHA-1: 25b465df153471597c9e87381c907d47416b3214 SHA-256: 5b82835951805a96d5b641963291a462ea8f296bbc50d4144f408562a1e69a5f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide clickable links. It contains numerous external URLs, including one pointing to 'dugedepap.ru', suggesting a campaign to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8627

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dugedepap.ru/award?keyword=bursary+application+letter+sample+pdf
    • https://cdn.sqhk.co/birenejar/dhigjD1/mawijekirasufoju.pdf
    • http://m-laskin.ru/how_to_use_printable_iron_onngtdb.pdf
    • https://cdn.sqhk.co/rumoligodo/ggIxy1q/descargar_one_gun_stickman_hackeado.pdf
    • https://cdn.sqhk.co/tetolonul/ibDgire/3ds_max_shortcuts.pdf
    • https://cdn.sqhk.co/ludozenidi/ML4tSgh/ordained_definition_sociology.pdf
    • https://cdn.sqhk.co/metevetufi/K9J9ehf/sacrifices_must_be_made_steam.pdf
    • https://cdn.sqhk.co/fodexuxefeba/Igijegi/pianista_game_tips.pdf
    • http://jamonomikusuka.22web.org/avast_android_virus_definition_update_failed.pdf
    • https://cdn.sqhk.co/rawegili/gehcjaj/black_and_grey_frog_tape_wall.pdf
    • http://ukrinsure.com/bilepupopowopafabarorewobdjg5y.pdf
    • https://cdn.sqhk.co/fuluzagile/cljgjaj/dancing_neon_ball_rush_roadmap.pdf
    • https://cdn.sqhk.co/vomisape/j7ibgjY/nuts_bolts_of_college_writing.pdf
    • http://pavareginuko.22web.org/world_countries_and_capitals_map.pdf
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_86058f359b964dfc860090f3bb4de16a.pdf?index=true
    • http://sanubexudo.rf.gd/chicken_biryani_tayari_vidhanam.pdf
    • https://uploads.strikinglycdn.com/files/fa722b22-9c97-4620-86cc-1b623b12e25c/what_questions_are_asked_in_a_high_school_interview.pdf
    • https://uploads.strikinglycdn.com/files/8acff30c-637b-4933-ab85-9dffae3283fc/7678721680.pdf
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_a1c8478ad1e242438b21e031bb67a3c7.pdf?index=true
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_57f352803d4d43f6ad5a0591d5567f6b.pdf?index=true
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_c5ad2ab24a9f43a69eec1f14e7318c27.pdf?index=true

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