Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddc6a7fc343578d…

MALICIOUS

PDF

42.3 KB Created: 2021-05-20 01:13:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fa4b2d7c7814f3153ba1cf7079642772 SHA-1: a38ffc161789252175e30a8f6c7cfb76e1e46e3a SHA-256: 6ddc6a7fc343578d38db2abebc91b3c5deee1997344ccd4732885bd616052f81
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body and embedded artifacts are obfuscated, but the primary lure is clear. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coinmaster-rewards-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-fun-hack_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
stream_003_off000047db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DB 25856 bytes
SHA-256: 6aa1e28fd991c5bb364b0cd8d4d6d5f6ed856dd44bcb535305d197650ae29aef
font_01_sfnt_off00008348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8348 18144 bytes
SHA-256: 3304910cf416930b47305d75e02d2266dd9cc93df9b4dcfa32843af2f30c9813

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