Malicious PDF — malware analysis report

Static analysis result for SHA-256 18eb2cee9720ad37…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 17:03:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: df8f7877bc75554731e404a35aa09271 SHA-1: 0843a40eb3a1f1d3adbda34387400eeb7150ccea SHA-256: 18eb2cee9720ad37641e7261284e6e798ebdb527f2eb10e08ae3d6802661f998
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external resources, many of which are presented as guides for obtaining free in-game items, suggesting a lure for potentially malicious downloads. The presence of a 'password-protected archive handoff' heuristic indicates that the document likely directs users to download an archive which requires a password, a common tactic to bypass security filters. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/how-to-get-free-robux-greenlegocats123-game-hack
    • https://library.stikeswnpalu.ac.id/repository/command-for-test-all-the-roblox-gears-free-admin_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdf
    • https://library.stikeswnpalu.ac.id/repository/microsoft-roblox_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-robux-hacks-legit-no-survey_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-robux-obby-no-password_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/easy-robux-hack_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-redeem-card_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/roblox-btool-comand-without-hacks_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/script-for-have-gamepass-free-roblox-pastebin_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/roblox-pc-hacks-for-free_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/advertise-for-free-robux_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/coin-master-cracked-apk-free-download_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-app-ios_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/minecraft-free-no-download_GM479516143.pdf
    • https://library.stikeswnpalu.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/como-hackear-counter-blox-roblox-offensive-en-espaol_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-make-your-roblox-shirt-free_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/roblox-fly-hack_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-robux-2021-ios_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003159.bin
141f9ead0698deca45718d3d822f0c0166e027556d75f14f4c86400e8a4da6d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3159 22224 bytes
font_01_sfnt_off000062c5.bin
89bb97d47255a096d380ca9c27034587fee3d96d97abc9ebee1f962573e715fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 19464 bytes

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