Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f99a569b43b93b…

MALICIOUS

PDF

33.2 KB Created: 2021-06-29 03:02:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 71e49d8a7cca89ed6ccb71dda5ef5c5a SHA-1: 1670883aee55bd9286ae7489028545994a9ca917 SHA-256: 37f99a569b43b93b66cec8be3c565cd877d033183c5cf2acf604cebef1b83501
82 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/bandit.mask-how-to-get-free-robux-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hacker-name-generator_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-roblox-hacks-no-virus_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/assassin-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-how-to-hack-an-account_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-subscription-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-executor-2021-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/minecraft_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-free-robux-promotion_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-client_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-spins-on-coin-master-2021-ios_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
font_00_sfnt_off00002b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B48 21788 bytes
SHA-256: 8dd448a194fa676cd3eb65fc763ef6258c91beecb5c5716ee91bde8c09244670
font_01_sfnt_off00005af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF2 19772 bytes
SHA-256: 45b59cfc551654489aaf66edcd07c94b6cf5d7eea2f350dcc9412534b536133f

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