Malicious PDF — malware analysis report

Static analysis result for SHA-256 499e104372e83e2d…

MALICIOUS

PDF

41.5 KB Created: 2021-05-11 17:24:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 41bd53ce9fb64d089c456adea0b49f9f SHA-1: 514771ac1e12a34ebd6e7a998ef25e74e97bfd3a SHA-256: 499e104372e83e2d35844f2833fc95b88a1bd39f687b9eec7a3b691db0544178
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites offering 'free generators' or 'game hacks' for popular games like Roblox and Coin Master. These links are designed to lure users to potentially malicious sites, likely for credential harvesting or to serve further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.xyz/app/431946152/bux-free-robux-game-hack In PDF document text
    • http://bgnails.nl/images/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.micIn 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
font_00_sfnt_off000046a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46A0 25352 bytes
SHA-256: 820957adb8d44da073b9118910325bc750157a7f03f73ee5859d0e543e51ad23
font_01_sfnt_off000080c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C1 18012 bytes
SHA-256: 48dadac1a540eb24f39d188e0eb07df2fd2c4cea4184d8a92cbd726ce4786484

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