Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9a4e2e33858e8a…

MALICIOUS

PDF

50.6 KB Created: 2021-06-03 13:58:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c37651f2930b30f23e7e33061ae0baf0 SHA-1: 4745a8842a2a3e4edac1bc61dc46d4facd60028a SHA-256: 2a9a4e2e33858e8ac0de8c7ab2c0e78b9feb0f97044bd10b8e3862c9f9fdea17
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9779

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 https://netcdn.online/app/431946152/roblox-avatar-girl-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/by-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-no-root_GM406889139.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
stream_004_off000052d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D3 30464 bytes
SHA-256: 550d24f5162bf15f6cbd7afef93ee5d26ab121bdb39f072067af8179f3f21997
font_01_sfnt_off00009952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9952 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off0000a2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FF 18352 bytes
SHA-256: 3d1a7e31cbfe166c2953c40b7ca8dd362f8dec7d0da0a12b944125a91a11fcd9

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