Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8f3d985ee65958…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 12:36:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 542f0d3a89cb07e7e27f4f6b2fc93de1 SHA-1: 32d11c82d15523772843fc03061b5c87d0c3ccb7 SHA-256: 3f8f3d985ee65958d7f0cf9a633b37d3e69b8dd214ae4ae20facec72a9b3b61f
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 0.9797

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/406889139/corn-master-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/tiktok-free-without-downloading_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-rewards_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_off00005089.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5089 25156 bytes
SHA-256: 8d6490c48ddcd41ec71dfdad2b785816b986f3d462ede1392be6dc581aa6d730
font_01_sfnt_off000089b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B6 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off00009354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9354 17428 bytes
SHA-256: bb7ddfb5eeb119ecc025e94c1b8f2696886702df12a5472958d742496d82a376

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