Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8855761a8fbbe3c…

MALICIOUS

PDF

49.0 KB Created: 2021-06-11 04:30:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f676caf9f581a73f3d5f9f20ce066db3 SHA-1: 7f9111fdf2c434d1918beb85e1d61a8f2ab03276 SHA-256: c8855761a8fbbe3cc13216cfe70acb11f81a2b8e0580e87c434fed92963ea25e
122 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that form a link farm, primarily advertising game hacks and free in-game currency for popular games like Roblox and Minecraft. The ML classifier and PDF heuristics strongly indicate malicious intent, likely to direct users to malicious downloads or phishing sites. The document body and embedded URLs suggest a lure for game-related exploits or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-noclip-hack-download-jailbreak-game-hack
    • http://torkelson.se/images/how-do-you-get-minecraft-for-free_GM479516143.pdf
    • http://torkelson.se/images/hacks-for-coin-master-game_GM406889139.pdf
    • http://torkelson.se/images/free-minecraft-accounts-2021_GM479516143.pdf
    • http://torkelson.se/images/roblox-daethrun-hollowenn-update-cheat_GM431946152.pdf
    • http://torkelson.se/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://torkelson.se/images/free-robux-pastebin-may_GM431946152.pdf
    • http://torkelson.se/images/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://torkelson.se/images/free-robux-no-scam_GM431946152.pdf
    • http://torkelson.se/images/hacking-on-alt-account-roblox_GM431946152.pdf
    • http://torkelson.se/images/minecraft-java-server-hosting-free_GM479516143.pdf
    • http://torkelson.se/images/hackear-roblox-robux-gratis_GM431946152.pdf
    • http://torkelson.se/images/free-minecraft-capes-no-mods_GM479516143.pdf
    • http://torkelson.se/images/free-robux-gift-card_GM431946152.pdf
    • http://torkelson.se/images/best-free-minecraft-server-hosting_GM479516143.pdf
    • http://torkelson.se/images/free-minecraft-java-edition-account_GM479516143.pdf
    • http://torkelson.se/images/mcpe-download_GM479516143.pdf
    • http://torkelson.se/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdf
    • http://torkelson.se/images/free-coins-on-coin-master-generator_GM406889139.pdf
    • http://torkelson.se/images/coin-master-hack-spins-apk_GM406889139.pdf
    • http://torkelson.se/images/roblox-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005123.bin
9cefafa6f470fd8767e576f55c4ae54c7034626d09df005a08301e4a4ab4306f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5123 28432 bytes
font_01_sfnt_off00009092.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9092 2832 bytes
font_02_sfnt_off00009a43.bin
13e2112622debf2c9fc2517344f21fd31148168f0914373306540e76feafc7bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A43 19152 bytes

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