Malicious PDF — malware analysis report

Static analysis result for SHA-256 258e40ca88eca257…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 11:08:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c1fa9d6ba7fc0d29c404c3ca0c74348c SHA-1: 6e8f5c317f2bd990c77bf2426795111021407cbc SHA-256: 258e40ca88eca257094a677e291129b893d1d93ec4530771481d807999c46a6e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier as malicious and contains a large number of external links, many of which point to other PDF files hosted on similar domains. The document body and extracted URLs suggest a lure for game-related hacks and cheats, likely intended to lead users to download further malware or engage in fraudulent activities. The presence of numerous SEO-optimized links indicates an attempt to create a link farm for deceptive purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-viking-quest-hack-game-hack
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-apk_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-play-minecraft-online-for-free_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-extension_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-spins-on-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/websites-to-get-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-coins-twitter_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-cards-hack_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/minecraft-windows-10-key-free_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/robux-no-human-verification_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-minecraft-coins_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/roblox-redeem-codes-free_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/minecraft-realms-free-trial_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/minecraft-gun-games-free_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fba.bin
73a633284d16f904b0919264682e67313511d77c00578c50849efde70403dd47
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FBA 25484 bytes
font_01_sfnt_off0000897c.bin
cdd7d2044fff2b3d5d42961dfcf560b0c02369c6689bd16c26f5d034f53f0ba6
pdf-font-stream PDF embedded font (sfnt) at offset 0x897C 18436 bytes