Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d9931ff113e1cb…

MALICIOUS

PDF

40.8 KB Created: 2021-04-27 05:34:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6f0448e252a7dcf259d6f604692706e9 SHA-1: eb5dd27bf3897e312c114133c3ef784f56d5cd5c SHA-256: 33d9931ff113e1cbb60fc64b72ce16e0b8e5645bb8452d38b6560f3eb054aa30
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a game hack redirect lure, indicating a phishing or scam attempt. The document body, though partially corrupted, suggests a theme of 'hacking' and 'free generators' for the game Roblox. The primary URL, https://netcdn.xyz/app/431946152/how-to-hack-gear-in-the-roblox-catalog-game-hack, is a key indicator of the malicious intent to redirect users to potentially harmful sites.

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/how-to-hack-gear-in-the-roblox-catalog-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-clown-van-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-cool-outfits.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-legit-no-survey.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/download-roblox-pc-windows-10-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-doungnquest-legandary-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-sans-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-kindle-fire.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-jailbreak-unlimited-free-money-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-build-a-boat-for-treasure-fly-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-roblox-hydra.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_off00004216.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4216 25980 bytes
SHA-256: 4400928f561ba67fb066e04803ebacdf9f55768b05d5f2286aafc659e11e9417
font_01_sfnt_off00007bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCE 18904 bytes
SHA-256: 7b2af7fbd0d6a48d4c2a0f5462d9033b122e986114b590c450f17d66d9e9e2ed

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