Malicious PDF — malware analysis report

Static analysis result for SHA-256 878dc63f09ec7229…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 10:14:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c4c34038f700b85ca61682cb84c0075d SHA-1: 561582238c9ac622f68298c194cd343c984ca3dc SHA-256: 878dc63f09ec7229be14773ae15931909ba829ab975eb4292fc37899bd4f148d
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways. These links, such as 'http://netcdn.co/app/431946152/how-to-get-hair-for-free-on-roblox-game-hack', are designed to lure users into downloading further content by promising free in-game items. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports a malicious intent to distribute potentially harmful files.

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/how-to-get-hair-for-free-on-roblox-game-hack
    • http://elektrofahrspass.de/images/robux-free-promo-codes_GM431946152.pdf
    • http://elektrofahrspass.de/images/games-that-give-free-robux_GM431946152.pdf
    • http://elektrofahrspass.de/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://elektrofahrspass.de/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://elektrofahrspass.de/images/how-to-get-free-things-on-roblox_GM431946152.pdf
    • http://elektrofahrspass.de/images/free-spins-for-coin-master-game_GM406889139.pdf
    • http://elektrofahrspass.de/images/best-tricks-co-robux_GM431946152.pdf
    • http://elektrofahrspass.de/images/how-to-get-free-premium-roblox_GM431946152.pdf
    • http://elektrofahrspass.de/images/free-robux-pastebin_GM431946152.pdf
    • http://elektrofahrspass.de/images/robux-hacks-reddit_GM431946152.pdf
    • http://elektrofahrspass.de/images/cheat-codes-for-roblox-free-robux_GM431946152.pdf
    • http://elektrofahrspass.de/images/coin-master-free-spins-and-coins-generator_GM406889139.pdf
    • http://elektrofahrspass.de/images/hack-roblox-tener-robux-gratis-2021-diciembre_GM431946152.pdf
    • http://elektrofahrspass.de/images/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://elektrofahrspass.de/images/free-robux-codes-2021_GM431946152.pdf
    • http://elektrofahrspass.de/images/roblox-free-online-building-game_GM431946152.pdf
    • http://elektrofahrspass.de/images/minecraft-pe-apk-download-free-015-0_GM479516143.pdf
    • http://elektrofahrspass.de/images/roblox-how-to-be-a-nerd-no-robux-or-hacks_GM431946152.pdf
    • http://elektrofahrspass.de/images/how-to-get-free-robux-com_GM431946152.pdf
    • http://elektrofahrspass.de/images/coin-master-raid-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000318e.bin
79c3e22ab57491a8b99986ffef8eaef6472432ccfae63c0d36027e6ab8920fa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x318E 22192 bytes
font_01_sfnt_off00006302.bin
5c4727e824134b8aa03a5a337a894bb8ae090d6229d04f859609e8e77c63373f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 18852 bytes