Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c5ddb1b587640d…

MALICIOUS

PDF

36.3 KB Created: 2021-06-27 00:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 15a069ac68043e4a471d258ef12cd9b4 SHA-1: 10b394a5f5fe98940ea79a05f78e724760887734 SHA-256: f4c5ddb1b587640dd159a963e51996d6f3e95169ddcf6dc903d4770ea1c6f3c0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains invisible links disguised as CAPTCHA lures, directing users to external websites. The heuristic 'PDF_CAPTCHA_LINK_LURE' indicates these links are designed to deceive users, likely as part of a phishing or malware distribution scheme. The presence of multiple URLs related to game hacks and free currency further supports a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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.co/app/431946152/can-you-make-shirts-free-on-roblox-game-hack
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-subscriber-key_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/roblox-dayz-cheat-codes_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/robux-hack-free-no-verify_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-generator-ios_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/robux-hack_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/rbxfree-com-free-robux_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/how-to-get-free-clothing-on-roblox_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/admin-cheat-roblox_GM431946152.pdf
    • https://www.learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/roblox-profile-picture-free_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/easy-robux-today-hack-no-human-verification_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/dragon-ball-z-final-stand-free-roblox-hack_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-robux-no-hacks-or-human-verfication_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/play-minecraft-online-free_GM479516143.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/roblox-to-get-robux-hack_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-robux-card-codes_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-robux-captcha_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034a7.bin
cbf75b4f8e7d8ca6fa6580a714556c073d8ea60d5064863533c5b0758f233236		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34A7 22632 bytes
font_01_sfnt_off00006717.bin
0c74497ca9ed9e1be6a95bbf6f68934b450668280609918963fbe71b6a066b43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6717 19708 bytes

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