Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db233e57b9e7211…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 11:32:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3608a279cf66dac5c93100bd9cb82201 SHA-1: 8d8afe7c6d8ebce915da6324e15f38e276794c1d SHA-256: 8db233e57b9e7211f5222c93dd2efe632d0bd9a7f23b770166a115dfa7ba729e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a prominent lure related to free in-game currency for popular games. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure and password archive lure suggests an attempt to trick the user into downloading a second-stage payload. No scripts were extracted, but the overall pattern indicates a phishing or malware distribution attempt.

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/free-spins-on-coin-master-game-game-hack
    • http://e-library.dharmawangsa.ac.id/repository/pokemon-go-free-poke-coin_GM1094591345.pdf
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-robux-on-roblox-for-free-2021_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-coins-free_GM479516143.pdf
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-link_GM406889139.pdf
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-generator-2021_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-windows-10-edition-free_GM479516143.pdf
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/hacks-roblox_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/rob-hacker-robux-generator_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/op-rewards-free-robux_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/get-5-free-robux-just-for-signing-up_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/pubg-uc-india-price_GM1330123889.pdf
    • http://e-library.dharmawangsa.ac.id/repository/roblox-troll-outfits-free_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/worst-client_GM479516143.pdf
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdf
    • http://e-library.dharmawangsa.ac.id/repository/best-hacked-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003377.bin
b4f1406a1b0ff37cacdd1646f5dc748efcc6ce424313506d3647d926068ef9a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3377 22804 bytes
font_01_sfnt_off000066a2.bin
4593a1a2ad250b9c338d1094e610fce2cd2b7d4b85c0b8acce75d41d0f65b4d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 18432 bytes

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