Malicious PDF — malware analysis report

Static analysis result for SHA-256 22eb118a338e4dbc…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 04:40:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 19564ce6926f29fd70a8136822c1c6b7 SHA-1: 24d68fd415c6b4f4b6ba50fdd36d27a843f5698d SHA-256: 22eb118a338e4dbcc4c5845bef6196ea637a08e5f30de04c19ba21d57a972254
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spin-link-daily-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/how-to-look-aesthetic-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-vehicle-tycoon-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-add-ons_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-free-2021-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-dominus-roblox-real_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-accounts-full-with-roebucks_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-no-download-no-password_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
stream_002_off00002f06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F06 23464 bytes
SHA-256: 304320f67a0efc89bbc7e726e31156b4c6db2ede020d6fec8d7d5e2ad72cc36d
font_01_sfnt_off0000643b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 18768 bytes
SHA-256: 498336de1cd41264755a901ac6a708e704256ea26d4bea7bf38f3dffbc9a1f74

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