Malicious PDF — malware analysis report

Static analysis result for SHA-256 69367b467892bedd…

MALICIOUS

PDF

45.5 KB Created: 2021-06-09 16:58:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 069ba01198382d218743faf834c6891b SHA-1: 714cd82f885acdb0afb5cbec4c7b41b4386e04f2 SHA-256: 69367b467892beddfacfbfdd6fb0bf6f1ea56bb8338fb4b65652c3843c4c6ee4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, including a primary link to 'cheats-for-roblox-how-to-get-free-robux-2021-game-hack'. This indicates a lure designed to trick users into downloading potentially malicious content. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of embedded URLs and the nature of the lure suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/cheats-for-roblox-how-to-get-free-robux-2021-game-hack In PDF document text
    • http://razredna-nastava.net/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/login-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/tiktok-free-99_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-roblox-account-with-lvl-max-on-boku-no-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://direct-link.netIn 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_off00005141.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5141 25432 bytes
SHA-256: 6f7dba9b649c0a6b9c2209a8e381d7fc15c4572b7d0eca98c3f9766afab0c517
font_01_sfnt_off00008c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C72 19152 bytes
SHA-256: edbba768ffb12a55c29e4dd7defd6357259da346b4db3e6bab85aa5fc15f24fb

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