Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d67246b36c59dea…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 00:29:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 29d889034425b208ae20cb14c738d461 SHA-1: a18d368bcdffd73450b6326603ebdc34a8305df2 SHA-256: 3d67246b36c59dea6f8f04080744f440115bf7a92840e758bca76056fae62a93
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 also contains this URL and other related links, reinforcing the lure for game hacks. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves tricking the user into clicking the embedded link, which likely leads to a malicious download or phishing site.

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/robux-without-verification-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-app_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-pics_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-without-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/pubg-uc-hack-2021_GM1330123889.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-exploits-on-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-got-hacked-2021-video-and-evidence_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/cheat-codes-for-pet-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-pin-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-robux-hack-february-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-i-hack-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-you-get-free-robux_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_off00002df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF4 22416 bytes
SHA-256: a0fb79808da1979e24db665db0cb2fd1fcd72fa73cd3d87a7c0ae4a546b09942
font_01_sfnt_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 19276 bytes
SHA-256: 4a2d2f668e89c70dfb6e16bd6998a43472677e1b3c1a09af93738297e9a51636

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