Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18c559b2c857d2d…

MALICIOUS

PDF

42.4 KB Created: 2021-04-27 15:41:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9b9475f4e91bb45fffb1359b9ce6a3a1 SHA-1: 16eeea88c058d39c0c13910c3801d324703a39a5 SHA-256: e18c559b2c857d2dc55963365f72bcbe73a4ebfc53e5762fe794b9248e0c6663
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to game hacking, directing users to a suspicious URL. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious site, likely for phishing or malware distribution.

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-be-a-hacker-on-roblox-ipad-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/free-api-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/dragon-keeper-roblox-cheats.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-november.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hacks-xray-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-catalog-items-for-free-roblox-no-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-prison-life-v2-0-hack-exploit.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-redeem-toy-codes-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hack-and-cheats-apk.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-boy-shirts-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/what-does-ce-stand-for-the-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_off000045de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45DE 26724 bytes
SHA-256: 79c7363d099198478514be4ef4e3b22ba7f5d6c4ffba51ce9f8bdc12e38d139b
font_01_sfnt_off0000828c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828C 18696 bytes
SHA-256: 115f99f0bea8ea9a41ba2db36b0a5cafd8259636ac566652beabbc0848a02342

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