Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c81ec4e34dd179e…

MALICIOUS

PDF

45.4 KB Created: 2021-06-07 18:01:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 89e7fdf8aca36ff23ef86fa8341293e4 SHA-1: 3b79a6f8e073ea829153b83ba1177da0400cebac SHA-256: 0c81ec4e34dd179e588c07df1197a1d5e72eb7a0d32151775acd3ea5fc9baa8a
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a prominent link to 'netcdn.tw' which is associated with downloading game-related hacks, suggesting a lure for potentially unwanted or malicious software. The presence of a visual download button and a callback lure further supports a phishing or scamming intent. No scripts were extracted from this sample, and the document body is heavily obfuscated, limiting deeper analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/descargar-roblox-hackeado-con-robux-infinitos-2021-game-hack
    • http://www.copoint.co.uk/images/free-coin-master-glitches_GM406889139.pdf
    • http://www.copoint.co.uk/images/facebook-coin-master_GM406889139.pdf
    • http://www.copoint.co.uk/images/free-roblox-accounts-dantdm_GM431946152.pdf
    • http://www.copoint.co.uk/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://www.copoint.co.uk/images/robuxhub-net_GM431946152.pdf
    • http://www.copoint.co.uk/images/get-robux-for-free-2021_GM431946152.pdf
    • http://www.copoint.co.uk/images/coin-master-tiradas-gratis_GM406889139.pdf
    • http://www.copoint.co.uk/images/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://www.copoint.co.uk/images/tiktok-free-download-for-pc-windows-7_GM835599320.pdf
    • http://www.copoint.co.uk/images/bux-free-robux_GM431946152.pdf
    • http://www.copoint.co.uk/images/free-2021-robux_GM431946152.pdf
    • http://www.copoint.co.uk/images/minecraft-windows-10-edition-free-download_GM479516143.pdf
    • http://www.copoint.co.uk/images/how-to-get-free-robux-gift-cards_GM431946152.pdf
    • http://www.copoint.co.uk/images/roblox-no-download-hack_GM431946152.pdf
    • http://www.copoint.co.uk/images/get-free-followers-on-tiktok_GM835599320.pdf
    • http://www.copoint.co.uk/images/minecraft-hack-client-18-9_GM479516143.pdf
    • http://www.copoint.co.uk/images/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://www.copoint.co.uk/images/robux-com-free-robux_GM431946152.pdf
    • http://www.copoint.co.uk/images/robux-premium_GM431946152.pdf
    • http://www.copoint.co.uk/images/buy-robux-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050f2.bin
41e877735b5a2066fdd3abe4eacb370dc5ffc4979ceba2b4e261b3bb14f23134
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F2 25312 bytes
font_01_sfnt_off00008a93.bin
015b1348fd3ada9bcbe26726a7a0825c68d8c11ba30c91b9a2680a7359fda4cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A93 19576 bytes