Malicious PDF — malware analysis report

Static analysis result for SHA-256 317ae4585fca98c2…

MALICIOUS

PDF

46.3 KB Created: 2021-06-04 00:00:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e79d9dee713e6e62d07d6c4507f90bde SHA-1: 5e709dc5a0c01218261ff7fe5351be468a963bb4 SHA-256: 317ae4585fca98c2f769d6fc42db2aafa7c5eabe39ac2b9426bcdf47482b21f6
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 0.9832

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/how-do-i-get-free-robux-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/como-hackear-coin-master-espaol_GM406889139.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_off00005313.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5313 27008 bytes
SHA-256: ea854b5eaafd402a8d89e4f6aaa5bb514b6f15e6601d964e513d5087b7b39dbd
font_01_sfnt_off00009226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9226 18452 bytes
SHA-256: af4dc877dda7dbd9aa71ce66d9a52868b07d358fe63790b9b74aede2acb33558

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