Malicious PDF — malware analysis report

Static analysis result for SHA-256 cccddfb66f372ade…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 08:53:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ccf97cd3b498b0ce4a817705fd1a4d3d SHA-1: 3ee9e394f836ea7fb5ec3be258773b9210a4e04b SHA-256: cccddfb66f372ade9649d207d7ba94c3404c77d78577591865a51694190ec55c
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that explicitly advertises hacks and 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 seeking such content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file, likely due to the deceptive content and the potential for these links to lead to malware downloads.

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-royale-high-school-hacks-de-todo-tipo-game-hack
    • https://morishita-tc.com.tw/image/data/files/free-robux-please_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/free-robux-today_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-apk-2021_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/robux-generator-no-verification-2021_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/free-spin-link-for-coin-master-game_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-iphone-2021_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-look-cool-for-free-in-roblox_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/minecraft-hacks-for-2b2t_GM479516143.pdf
    • https://morishita-tc.com.tw/image/data/files/get-me-robux-for-free_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/free-spins-coin-master-links-app_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-and-get-free-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-viking-quest-hack_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/free-roblox-exploits-2021_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/roblox-murder-mystery-free-online_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/free-robux-no-verification-at-all_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e4e.bin
de1967688e3be0d74553a773dde0343d99922a74a800b63f1a5b2a5c29640c17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4E 22764 bytes
font_01_sfnt_off00006195.bin
d45e2271c40289632b35d975ecfc2b847a33e1d26b3b6f4ef060721a8c31a17c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6195 19640 bytes

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