Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1a28ce9b03c657…

MALICIOUS

PDF

42.8 KB Created: 2021-04-28 06:04:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d09e831f4dfd7203ee31aa82a317a77d SHA-1: 1d4d7f7319728b468eb62de2804ea105108946cb SHA-256: 1a1a28ce9b03c6576bf3d3fd12c1c96fe40e0b8d1cc9131d751b3e8de2712b39
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free items, directing users to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a malicious site for potential credential harvesting or further malware delivery. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9836

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-get-free-shirts-on-roblox-208-november-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/free-robux-hack-v3rmillion.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-robux-easy-2021-pc.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hacker-2021-download-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-robux-on-phone-no-human-verification.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-toy-codes-december-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-robux-legit-with-proof.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/robux-logo-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-how-to-make-your-character-look-cool-for-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/roblox-lvl-7-script-executor-free.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004060.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4060 24624 bytes
SHA-256: 78a463c5fc33378a40d44f1da6477918e1cc9c3ff0a7a8197bf26ecebed0af76
font_01_sfnt_off0000785a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x785A 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off0000821b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821B 19384 bytes
SHA-256: f0487f895b7780d857c8642cc044d2f20243a33962c4bdf53849fd21c3ab8ae2

Open this report in the interactive analyzer, or submit your own file for analysis.