Malicious PDF — malware analysis report

Static analysis result for SHA-256 af43cf3673c0d9dc…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 10:42:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b8dd1406875840511cd88c40706f7da4 SHA-1: 7b093765ae93b25bb994c044bf3300681d97a81f SHA-256: af43cf3673c0d9dc9453c2554d7ec01df149463a0f5173a424b306f2bb434343
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly mentions 'Robuxglobalcom No Verification' and links to resources promising free in-game currency. The presence of a heuristic indicating a 'Password-protected archive handoff' suggests that the linked content may be an encrypted payload. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/robuxglobalcom-no-verification-game-hack
    • http://library.feb.unila.ac.id/rfeb//repository/free-spins-coin-master-2021_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-spin-link-app_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-free-gift-card-codes-reddit_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-human-verification_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/pubg-uc-live_GM1330123889.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/top-10-best-free-items-on-roblox_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/raviz-cheating-roblox_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-tiradas-gratis-2021_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-no-password-needed-or-verification_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/blox-pink-robux-free_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-get-free-roblox-money_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/free-online-games-like-minecraft_GM479516143.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-the-quarry-cheats_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hack-client-mac_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/pokemon-go-joystick-free-download_GM1094591345.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/free-unlimited-coins-for-coin-master_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-free-coins-link-2021-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003155.bin
f32597c4cd717789c857c92c16b2ccf838ee8e7476119f82d9f4e4ae9a31d36a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3155 22744 bytes
font_01_sfnt_off000064a0.bin
6b63eb57ff7f0570f867c922be0f3fd595e847af2b11a53457756d615b7e0fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A0 19244 bytes

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