Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ead03230c74b61…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 00:31:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cf7f0d2176d437b897b668cc0434b129 SHA-1: 7e9aeef6a064697baa6b9d38a7b20e19885f0aed SHA-256: c4ead03230c74b61f3cfcbe4e920f9dd3b4830dcfd9a3b4857a464d3ce640bb9
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which are presented as cheats or hacks for popular games. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute further malicious content or lead users to phishing sites. The document body, though partially corrupted, contains references to game hacks and URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-rpg-world-hack-game-hack
    • http://stpc.it/images/codes-to-get-free-robux_GM431946152.pdf
    • http://stpc.it/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://stpc.it/images/robux-cheat-websites_GM431946152.pdf
    • http://stpc.it/images/free-russia-sign-roblox-pls-freeeeee_GM431946152.pdf
    • http://stpc.it/images/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdf
    • http://stpc.it/images/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://stpc.it/images/fb-coin-master_GM406889139.pdf
    • http://stpc.it/images/free-coin-master-spins-2021_GM406889139.pdf
    • http://stpc.it/images/coin-master-hack-online-download_GM406889139.pdf
    • http://stpc.it/images/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdf
    • http://stpc.it/images/how-to-get-free-robux-2021_GM431946152.pdf
    • http://stpc.it/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • http://stpc.it/images/free-robux-without-verification_GM431946152.pdf
    • http://stpc.it/images/minecraft-dungeons-free-download-pc_GM479516143.pdf
    • http://stpc.it/images/icloud-the-cheating-app-for-roblox_GM431946152.pdf
    • http://stpc.it/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdf
    • http://stpc.it/images/free-spins-coin-master-links_GM406889139.pdf
    • http://stpc.it/images/apocalypse-rising-cheats-roblox_GM431946152.pdf
    • http://stpc.it/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://stpc.it/images/coin-master-free-spins-link-today-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ee0.bin
4fa8c40c748fd7d71ac542b153b722ff0f7aa7f05e598c6c05c306167c25e3d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE0 22788 bytes
font_01_sfnt_off000061b4.bin
ee13ab354f6a6f81589bc7235b7e7fec47cd420a0b260130a2c5f137c7e28cb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x61B4 19020 bytes