Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce498e4994690a4…

MALICIOUS

PDF

32.7 KB Created: 2021-06-21 08:10:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fb7f2455abc1e2f5e6c2b6a7a6a0c7f2 SHA-1: 51d8de9b22c79f2f58debf51cdfbe21a459e9223 SHA-256: 6ce498e4994690a4a08bc55434cb5a8eb4c98648a3503cb7d3af83ab3ee72947
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs, many of which are presented as links to game hacks and free items, suggesting a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports its malicious intent. The document's content and structure indicate it is designed to trick users into clicking through to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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-free-scarf-game-hack
    • http://feuerwehr-rheinau.de/images/free-spin-coin-master-hacktoman_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/coin-master-free-spin-app-2021_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/master-hack-coin_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/hack-coin-master-download-ios_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/coin-master-hack_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/hacking-into-someones-roblox-account-2021_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/hack-coin-master-link_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/free-shirt-roblox_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/roblox-free-robux-generator_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/free-tiktok-likes_GM835599320.pdf
    • http://feuerwehr-rheinau.de/images/free-robux-glitch_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/hacks-for-flora-frenzy-roblox_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/free-coins-coin-master-haktuts_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/como-hackear-ropa-en-roblox-2021_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/hack-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d74.bin
d56664d8d10c8a4b4d900f9c80de66487e8f5f229cba4cd04c461f7e720e675a
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D74 21216 bytes
font_01_sfnt_off00005bc4.bin
cd4d74fb7e9d10f81b666a97f3c3a76ae35e74d6d039b5cc22863ed740c98d6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC4 18652 bytes