Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9374517be43aa0…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 22:02:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: df85afb077c9742fe2f486747b0d2536 SHA-1: 6a472d511c2bb650afa1d762ae2c5393e393d287 SHA-256: 5b9374517be43aa03c40893b14cc0f9a1907d38096705ab897396bd47b717fbc
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs, with a primary link to 'netcdn.tw' that is flagged as a game hack lure. The heuristic 'SE_FAKE_CAPTCHA' indicates the document likely presents a fake verification prompt to trick users into executing further actions. While no scripts were explicitly extracted, the nature of the lure and the presence of external links suggest a potential for downloading a second-stage payload or redirecting to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/getrobux-info-game-hack PDF link annotation
    • http://digilib.akperkabpurworejo.ac.id/repository/descargar-roblox-hackeado-2021_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/how-to-get-free-code-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-meep-city-free-coins_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/cheat-engine-roblox-jailbreak-noclip_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-dragon-ball-rage-stats-hack_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-output-hack_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/how-to-get-your-hacked-acc-back-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-speed-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/games-voody-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/how-to-get-free-robux-from-codes_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/free-shirts-that-cost-robux-youtube_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-hack-roblox-treasure-hunt-simulator-get-rebirth_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000314f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314F 21904 bytes
SHA-256: 26d4bcc6e1d01a3924d6ee813fd3a6fb4fe99dfa4ce7059341bb6dbd345c697e
font_01_sfnt_off000061b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B7 18656 bytes
SHA-256: dc0a3c3c5acdce1f00df61ff0cd7230377149e24fc46f8acb7cd7add040d8ac7

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