Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c343453a63445d2…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 17:55:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: acf4cf2567e628ea7d2493a4095cec2a SHA-1: f7ece8c6a6c7292ef223df1c56cf5949a97f5978 SHA-256: 0c343453a63445d2d849fb1f4828bb82abccd479efa3f5982b9cc5de251f4ae8
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are presented as 'game hacks' or 'cheats' for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users with deceptive content. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to download potentially harmful files via these deceptive links.

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/hoz-to-hack-roblox-qcc-game-hack
    • http://rollipolli.hu/userfiles/files/free-robux-hack-builders-club_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/coin-master-online-hack_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-games_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/chisel-and-bits-mod-pe_GM479516143.pdf
    • http://rollipolli.hu/userfiles/files/counter-roblox-offensive-hacks_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/ways-to-get-free-robux_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/coin-master-free-cards_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/redeem-roblox-card-codes-free_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/free-online-building-games-like-roblox_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-2021-working-unpatched-free-robux_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/how-to-hack-money-in-heists-simulator-roblox_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/free-robux-codes-no-verification_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/free-coins--spins-coin-master_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/free-camera-roblox-script_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/roblox-sign-in-game-free_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/gift-cards-for-free-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_off00002fe7.bin
751863375d3fc70f901fe793d5d3954ef4dbb9aa975330bf2c9ec6d01af497ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE7 22316 bytes
font_01_sfnt_off00006192.bin
bffba488abaa8261c141e0ae8ab6f71a7033c8789b4c88359ce34ad3da987733
pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 18896 bytes