Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cbcc3ed826bd992…

MALICIOUS

PDF

40.8 KB Created: 2021-05-01 12:43:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b40046cc8f308d9db3ad754b6d47826b SHA-1: 2c2e11b8acaf72c8b677bd1ee900374fa5edaf27 SHA-256: 4cbcc3ed826bd99244bdb6fcdd99eae0be5b489e382861410fd6c917421e0484
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/cheat-engine-mac-roblox-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/hoops-hack-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-bee-simulator-cheats.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-password-hacker-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/visenya-roblox-hack.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-someone-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-rs-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/has-roblox-been-hacked-before.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-skins-stampycat.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-clothes-on-roblox-nbc.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-make-a-dll-hack-for-roblox.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_003_off000040f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40F7 25472 bytes
SHA-256: 47f92fb7d4283677d80779aa7f1257ac079d6a571afd5094d5a5d7f8e027e18b
font_01_sfnt_off00007bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF4 18888 bytes
SHA-256: e10a54774c7d628289853936f7775d462cd50f970db141f3c7225f1e8b472e9b

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