Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f4bd4896d5ba01…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 05:00:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1c8a8a1727c8ce74fc09f3ebacfea281 SHA-1: c90a0110dadcea4d0d22d0c6fcaff4155a54c5b3 SHA-256: 56f4bd4896d5ba01a359ff3716a2bd86bfd7a673764d7a66078a5296e8f843b3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free spins and game hacks, directing users to external URLs. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a 'download button' heuristic suggests an attempt to trick the user into downloading a payload. The heuristic indicating password instructions for an archive further supports the likelihood of a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-blogspot-free-spins-game-hack PDF link annotation
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-robux-redeem-codes-that-work_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/best-level-7-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/ultimate-random-night-how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/downloaf-free-roblox-robux-codes_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/is-hacking-banned-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/hack-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/how-to-hack-roblox-games-on-ipad_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-mad-paintball-2-cheats_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-group-admin-hack_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-roblox-outfits-girl_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/application-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/how-to-noclip-in-roblox-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-free-robux-hack-easy_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/hack-dragon-ball-rage-roblox-android_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/how-to-hack-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003054.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3054 22948 bytes
SHA-256: 1bebb448628d773b3aac1a8de141817185a6a2aed28e484fc1ae7f82a6ad34c3
font_01_sfnt_off0000640c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640C 18464 bytes
SHA-256: 44dfcd16e445fd6131b632965a2ae8aa6e64228f7c7e1827c044d7649ca93925

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