Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c98673a3a0b7ce6…

MALICIOUS

PDF

44.4 KB Created: 2021-05-17 08:55:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 69553ad3978ab77799cc8aa4c24ed332 SHA-1: 214afbc0e0354b09bf10817e5de6717e243fed50 SHA-256: 8c98673a3a0b7ce679b189fd3058469d39931019bd49612ca0bec9e2e9a5184f
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which are linked to game hacks and cheats for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly suggests maliciousness. The presence of a 'download button' lure further supports the intent to trick users into visiting these links, likely leading to malware downloads or scams.

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 https://netcdn.xyz/app/406889139/coin-master-apk-hack-3.5-8-game-hack
    • http://balkanin.com/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://balkanin.com/images/robloxfun-com-generator_GM431946152.pdf
    • http://balkanin.com/images/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://balkanin.com/images/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://balkanin.com/images/what-do-points-do-in-roblox_GM431946152.pdf
    • http://balkanin.com/images/coin-master-free-spins-and-coins-haktuts_GM406889139.pdf
    • http://balkanin.com/images/how-to-get-free-robux-without-offers_GM431946152.pdf
    • http://balkanin.com/images/does-roblox-premium-expire_GM431946152.pdf
    • http://balkanin.com/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://balkanin.com/images/how-to-get-free-robux-generator_GM431946152.pdf
    • http://balkanin.com/images/coin-master-links-for-free-spins_GM406889139.pdf
    • http://balkanin.com/images/free-roblox-followers_GM431946152.pdf
    • http://balkanin.com/images/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://balkanin.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://balkanin.com/images/coin-master-hack-ios-2021_GM406889139.pdf
    • http://balkanin.com/images/coin-master-exchange-40-free-spins_GM406889139.pdf
    • http://balkanin.com/images/free-spins-from-coin-master_GM406889139.pdf
    • http://balkanin.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • http://balkanin.com/images/minecraft-116-free_GM479516143.pdf
    • http://balkanin.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004959.bin
4ce63f062921dd78cc8cf9a2b623a02ee8daf93d28cd54802427bb6322f2f75b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4959 29872 bytes
font_01_sfnt_off00008ac6.bin
b9b6adf449100deb59ed95ea3ad5e02aaf3681432d01b6b7dc02955a5f5017fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC6 18476 bytes