Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e9c7b36c99b39b…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 11:10:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 746243d97ddebad9f6410cc2f4116f04 SHA-1: 1e6ef4ac1632306f4123532ed84ac30a5dc400b9 SHA-256: 21e9c7b36c99b39b43c465591028c143167d86d04d68f4427dba123828320fd8
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external resources, many of which are presented as game hacks or cheats. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute further malicious content or engage in SEO poisoning. The document body and extracted URLs point towards a lure for game-related exploits.

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/mcmaster-club-coin-master-hack-game-hack
    • https://fridaytravelnepal.com/userfiles/files/roblox-money-hack-no-verification_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/hack-coin-master-apk-32-download_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdf
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-coin-master-2021_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/cool-minecraft-hacks_GM479516143.pdf
    • https://fridaytravelnepal.com/userfiles/files/free-minecraft-packs_GM479516143.pdf
    • https://fridaytravelnepal.com/userfiles/files/roblox-strucid-free-vip-server_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/free-gear-on-the-roblox-catalog_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/blox-world-free-robux_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/hack-version-coin-master-apk_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/rone-space-robux-hack_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/instagram-coin-master-free-spins_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/free-spin-coin-master-hack-2021_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/top-roblox-anti-cheats_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/http-totalrobuxonline-robloxgeneratorfreerobux2021_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/free-robux-on-iphone_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/minecraft-pocket-apk_GM479516143.pdf
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-daily-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003199.bin
c7ee303673a59b08033d4e4bb7aba9e4ecb610aad052f20073a16243706ed73f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3199 22792 bytes
font_01_sfnt_off000064a5.bin
3ff0f4f75a0a90b9327d70ca0f6ece0c1b2cc0f38d50ceb21f3733858aa42cbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 18636 bytes