Malicious PDF — malware analysis report

Static analysis result for SHA-256 903daeedf5ced70a…

MALICIOUS

PDF

45.0 KB Created: 2021-06-11 07:47:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2e5d2bfc65f0aeb5db36936dc2d1c78d SHA-1: 055ea25465f48eca3ea709f0c7c538dd07798f0c SHA-256: 903daeedf5ced70aa35600926c4e26e4ca55340ff9398f90c1e65ab18054715e
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, forming a link farm that directs users to pages offering game cheats and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'ML_NYX_PDF_MALICIOUS' score suggests a high probability of malicious intent. The document body, though partially corrupted, contains text related to game cheats and a URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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/cheat-roblox-vehicle-simulator-money-game-hack
    • http://dev.pmrscambodia.org/images/uploadfiles/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-followers-on-tiktok-for-free_GM835599320.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/earn-robux-today_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-link-download_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-free-master_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-spin-hack-coin-master-2021_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/hack-coin-master-spin-apk_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-for-free_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-coins-coin-master-haktuts_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/spins-for-coin-master_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/how-do-you-get-minecraft-for-free_GM479516143.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/online-hacking-tricks-coin-master_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-free-robux-easy_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-coin-master-spin-app_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-spin-and-daily-news-coin-master_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/get-robux-free-robux_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000519b.bin
1fce5ca9046b8cc849159ac744da37f8532eca4101c0cc109c7cabe9c94eab7f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519B 24984 bytes
font_01_sfnt_off00008a5a.bin
d2f5b01b49e0fc8acee5065b0df76e7bcc26cb7deefeeb8368b25548c85c5282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5A 19312 bytes

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