Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc33007c24619a1…

MALICIOUS

PDF

44.0 KB Created: 2021-06-10 11:45:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 91c45ff24922ba9e8bd9dd5cb2a43fbe SHA-1: 9b2ae86257928ddca978874b0f23bd7a0fb1f1e1 SHA-256: cbc33007c24619a10cd96a674ebaf563b161e0f7643bb162ff957945e0d8d57f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-to-get-free-robux-easy-on-tablet-game-hack PDF link annotation
    • http://uniman.ch/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://uniman.ch/images/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://uniman.ch/images/how-to-have-200-robux-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://uniman.ch/images/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://uniman.ch/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uniman.ch/images/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uniman.ch/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uniman.ch/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://uniman.ch/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://uniman.ch/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://uniman.ch/images/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://uniman.ch/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://uniman.ch/images/comment-hacker-des-gens-sur-roblox_GM431946152.pdfIn PDF document text
    • http://uniman.ch/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://uniman.ch/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://uniman.ch/images/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://uniman.ch/images/how-to-pubg-uc-hack-2021_GM1330123889.pdfIn PDF document text
    • http://uniman.ch/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://uniman.ch/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://uniman.ch/images/how-to-hack-to-get-robux_GM431946152.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_004_off00004ff7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF7 24256 bytes
SHA-256: fd7f9087f026b5dc9f3e597e301837b19980e448b66a8cff3887e49214579fa9
font_01_sfnt_off00008786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 18764 bytes
SHA-256: d9efa45312813170af1d6436f7378b4e92c4015454cc84169064f1697d2bea8b

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