Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf99dd0eca0525a…

MALICIOUS

PDF

36.2 KB Created: 2021-07-07 11:30:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e46769397b12ebb789d6c8a5ec9466e7 SHA-1: 4823485504f49b22b2cb536ef37e62dee3b6762c SHA-256: aaf99dd0eca0525a978c81c945abac76b22b2f9fd9524fb53dbee73af782b032
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.tw/app/431946152/how-to-get-free-premium-roblox-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/robux-gratis-funciona-hack-sin-cortes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-players-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cart-ride-for-free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-developer_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-script-sir-meme_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-wearedevs_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-chat-bar-roblox-void-script-builder_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/10-euro-roblox-karte-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-pet-simulator-hacks_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_002_off0000337e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337E 23132 bytes
SHA-256: 92b5d44fac94cdaa698e380ef94204a98d992c1217d0433d8031a5e73d0e30df
font_01_sfnt_off0000672d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672D 19592 bytes
SHA-256: 8d0174b0934bd13f73c8324677ef321856a80226dce412d68411a4eff9948ea0

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