Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca782b2b86b736f5…

MALICIOUS

PDF

36.9 KB Created: 2021-07-04 02:35:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c763bbc787b4c8fc1a40002a8264c0d7 SHA-1: db5b9808c1a863401c3df254c39692986de2a4b3 SHA-256: ca782b2b86b736f5fa7316145c406a749955fe23fe5f098ec619e5ef8c048653
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a URL that likely hosts a malicious payload. The document body and embedded links are consistent with a social engineering attempt to trick users into downloading potentially harmful software. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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-mod-apk-latest-version-free-download-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-robux-for-free-legally_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/pokemon-go-free-and-apple-watch_GM1094591345.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-codes-for-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-do-you-get-free-robux-on-tablet_GM431946152.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_off0000385e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x385E 22864 bytes
SHA-256: a43c199a6f24ffca602ec8d0dd3e92ec4594caefcab989b24a2c737511b58b40
font_01_sfnt_off00006b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B89 19060 bytes
SHA-256: 5bb4a7f404b467da3ea0089e53a7d43d95ff8f502634d4953fb8ca32fd81900c

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