Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4343125f602dc50…

MALICIOUS

PDF

51.3 KB Created: 2021-06-09 03:21:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a521972853fed88c4e7687888d842368 SHA-1: d3809562eb2025808ce5781eb4f19477dc63a0b9 SHA-256: e4343125f602dc505965c963a38c3ebab9013fab91258a0868624e01b1457bdc
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a call-to-action phrase, suggesting it is designed to trick users into downloading malicious content. The ML classifier also flagged this PDF as malicious. The presence of a 'password-protected archive handoff' heuristic indicates a common tactic to bypass security controls by encrypting the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 4

  • 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 https://netcdn.tw/app/431946152/robux-free-deniz-game-hack
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-hack-2021-free_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/pastebin-roblox-robux-hack_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/hack-para-roblox-jailbreack-coat-y-muchos-mas_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/robux-cheat-org_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/assassin-roblox-hack-script-cheat-engine_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-hack-a-a-roblox-account_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-get-a-free-valk-on-roblox_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/cheats-for-roblox-retail-tycoon_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/free-robux-no-verification-2021_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/xbox-roblox-free-john_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-money-hack-cheat-engine-64_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/guuudinforoblox-online-hack-for-free-robux-and-builders-club_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-hack-in-roblox-mad-games_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/free-games-at-roblox-2_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-get-free-robux-using-startingploit_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-free-exploit-executor_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/ejecutador-de-hacks-roblox_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/free-exploits-for-roblox-2021_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-exploit-hack-full-lua-overpowered-commands_GM431946152.pdf
    • http://aks-akk.ac.id/html/perpusakk/repository/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005369.bin
99c63ecc01edc93f7023f571112dcfbffef007658ae3da7a119a7ec275820d7b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5369 27628 bytes
font_01_sfnt_off000093d0.bin
a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D0 7448 bytes
font_02_sfnt_off0000a5b3.bin
09cdf9ca2e6036e7936cc0d5b6b6d4c1022097f75f1df47d5bb3de261fbdbb88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B3 18384 bytes

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