Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f66b50baf8f899…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 11:17:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3cd70e1810714ed6d88274b01ebc97a0 SHA-1: 88c0d5d3c7c226fd36b8378cda45d38d44973ead SHA-256: e6f66b50baf8f89975b6a4b8dfa9511dbf6c4cfe6a36045386b5da07635322e9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded links that redirect to sites offering 'game hacks' or 'free spins', a common lure for malicious downloads. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest an attempt to trick the user into downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/479516143/toolbox-premium-apk-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-de-robux-2021-100-real_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/tiktok-free-10k-followers_GM835599320.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-codes-no-human-verification_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_004_off0000559f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x559F 25440 bytes
SHA-256: 887e361481aa33af9ad1033f3710d45d593ce574efbd77ebe40f0605436581d7
font_01_sfnt_off00008f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F48 18720 bytes
SHA-256: c6d8a8114917d0b571f99818de1ca5c122efce3e05b979e024ea7c59263b2da1

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