Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb358521a7e9c96…

MALICIOUS

PDF

35.9 KB Created: 2021-06-20 01:11:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cd696f566a6f2bb3f7418ae8f3c60415 SHA-1: cfea3550280ac46040a1f6f66b3048317f7cf122 SHA-256: 1bb358521a7e9c967a4bba38a9b5796232b930a95b7e5bf6d8dbb684786fb2cc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://netcdn.co/app/431946152/roblox-free-robux-download-2021-game-hack PDF link annotation
    • http://digilib.akperkabpurworejo.ac.id//repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/admin-hack-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-bloxburg-free-gamepass_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/bacon-do-you-want-free-robux-buur_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/stickmasterluke-free-robux-game-link_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3396 22380 bytes
SHA-256: 836f1273c0bc002f087e8cd5bc292fe265b6e14dae17def7d55e9034494e8ab6
font_01_sfnt_off00006541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6541 19696 bytes
SHA-256: 2f18db856df17145d0e5bc228c97ebac76d45dc2cf4ac9e9dfd807e9329954d7

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