Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4cccf3ad8d6ac8…

MALICIOUS

PDF

41.5 KB Created: 2021-04-30 05:40:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 48911f1bddd29b73770e80d89d82c295 SHA-1: 2ae9da520db77caa9ee379717d878be8e8309cf3 SHA-256: cb4cccf3ad8d6ac8c722ded65b4da92833f1377b294ae0473db6ef37dc9e2497
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 0.9941

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/431946152/free-roblox-redeem-codes-that-haven-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/can-a-roblox-gift-card-give-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-2021-september.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hacked-script-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-how-to-get-free-robux-easy.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/the-conquerors-cheats-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/iron-man-simulator-roblox-war-machines-hack-lua-c-script.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-hack-xbox-one.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-to-get-robux-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/set-yourself-free-roblox-id.pdfIn PDF document text
    • https://freerobux.cyouIn 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_off0000446d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x446D 26036 bytes
SHA-256: b276448d7794dd6e45330989336570c42ea92c82177d6271f28d8f89d5a3f7d8
font_01_sfnt_off00007e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E74 18992 bytes
SHA-256: 18535658c5f9281f02cded2be7ad45b1c5080fade330aaabb74f28c83db088df

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