Malicious PDF — malware analysis report

Static analysis result for SHA-256 513a7d500efbc44d…

MALICIOUS

PDF

34.3 KB Created: 2021-06-27 23:02:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 68513e47d33549fea8106fe6ae1c2cda SHA-1: abcc788d39f9c4d86e7a0a75eef3b5252ad3ad84 SHA-256: 513a7d500efbc44d0841697a4d2a5293f51319ac125aceeb3df7517a2a8ec35f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-risk heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body, though partially garbled, includes the same URL and references game cheats, reinforcing the lure. The ML classifier also flagged the PDF as malicious with high confidence. No scripts were extracted, but the primary attack pattern involves redirecting the user to a malicious site via an embedded link.

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/boku-no-roblox-codes-cheat-sheet-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/youtube-ninja-animation-free-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-command-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/nope-hack-roblox-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-800-robux-for-free-on-computer_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/pubg-uc-hack-2021_GM1330123889.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-online-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-new-free-items-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/superhero-city-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-studio-how-to-make-a-free-robux-game_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_off00003014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3014 21896 bytes
SHA-256: 1420d750b17e760da6539d5b3e55bbceaa0c0e1bb6ce614a81695fca681a56af
font_01_sfnt_off00006059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6059 19240 bytes
SHA-256: 76dae0174e05dd6c250459767b1b74c9979418a97b08790851bf5a86c151ea9b

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