Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a5411376af2290…

MALICIOUS

PDF

48.5 KB Created: 2021-06-03 07:16:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7448394d983a75c388fdded7160273dc SHA-1: 29d213dc161c6dc74700fd634c1a0d4f6e037646 SHA-256: d3a5411376af22904280826d16b437e042f3c4868dd6c102bb04887c0ede6dc5
122 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 routes users through malicious redirector infrastructure and 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 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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 https://netcdn.online/app/431946152/free-robux-pin-codes-game-hack PDF link annotation
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/pubg-uc-free-2021_GM1330123889.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/robux-converter_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5390 26584 bytes
SHA-256: cf469b704258c17389da8c3eeee980e8e4bb9d118839c08184bee61856307f4c
font_01_sfnt_off000090b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B5 2832 bytes
SHA-256: 78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805
font_02_sfnt_off00009a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A66 18464 bytes
SHA-256: 23872266a6577b01853888d52c04c526ac323517b7f86f8cb64f3b9e81653507

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