Malicious PDF — malware analysis report

Static analysis result for SHA-256 5450b60bd6197868…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 06:47:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 276c7c3d47f9f306efac6172f9d36b19 SHA-1: 87ba75a5c04ec8c908cd5be89d921168ec93bcad SHA-256: 5450b60bd6197868858a5bc480a03835ab1476719502b95a374d2805092f45a5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to 'netcdn.tw', which is indicative of a phishing or scam attempt. The document body and extracted URLs suggest a lure related to game hacks and free in-game currency, aiming to trick users into clicking malicious links. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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.tw/app/406889139/hack-my-spins-coin-master-game-hack
    • http://library.unissula.ac.id/fk/repository/free-coin-master-spins-link-facebook_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdf
    • http://library.unissula.ac.id/fk//repository/roblox-play-as-guest-free_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-free-codes-generator-no-surveys-no-download_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-apk-2021_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-hats-on-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/miss-play-com-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/f12-robux-hack_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/freerobuxhack-us_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/hacks-to-insert-in-roblox-console_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-robux-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/how-do-get-free-robux-on-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/on-roblox-someone-hacked-me-and-lost-all-my-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/free-money-and-spins-coin-master_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/free-rewards-coin-master_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/girl-roblox-avatar_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-modded-minecraft-server-hosting_GM479516143.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-hack-2021exe-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033b5.bin
0cee677b74ae2316878c5159191457d0f0bb8b5d9e0b3bacaf2ce3b56ee0b772		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B5 23528 bytes
font_01_sfnt_off000068d4.bin
d3f4073d27df4065fdae41c61e3722dfa23d28428d4dd91a08b4daaa7000713b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D4 18360 bytes

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