Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d923a8c741612e…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 10:16:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a7c116141de5014e80dd6829e8ca9853 SHA-1: d79ee69d85b378fdb793d6f2bd5087208f11d770 SHA-256: e8d923a8c741612e804271d18c256527cab535377e93da8b801db78c1f2d4c39
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 0.9769

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/1330123889/pubg-uc-discount-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/picture-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-tiktok-views_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-pocket-edition-mods-for-free_GM479516143.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_off00004dff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DFF 28612 bytes
SHA-256: 672232f454cc7ad888efe46e4b456500be87e20fcdcba5cb4188dcea1d50e20a
font_01_sfnt_off00008b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B70 2816 bytes
SHA-256: eaaa57724c6c9fa744849bad159cc913dd8c615188bac3ab9dd7265dd83d9e73
font_02_sfnt_off0000951b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x951B 18432 bytes
SHA-256: e35468a03b702248717919594925d94bd3881a00308387749a8ebc4acf2c4d3c

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