Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e25778a812dae37…

MALICIOUS

PDF

34.8 KB Created: 2021-07-02 05:32:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ae0194b7ddd2fdd0a30b8a3d73c5594f SHA-1: 8787d4198d1c392a24b125b7012b4ee5ffa58922 SHA-256: 3e25778a812dae37875e345f5a9c6af6627f380a62ac2d6a8a94fbc72d8a98cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, disguised as game hacks and free generators. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-dashing-simulator-hacks-game-hack. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-dashing-simulator-hacks-game-hack In PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-hack-no-human-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-xbox-360-download-free_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/this-code-gives-you-1-billion-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-plus-ultra-hack_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/create-app-like-tiktok-free_GM835599320.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hacks-minecraft_GM479516143.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
font_00_sfnt_off00002f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F54 22500 bytes
SHA-256: 9087258263fc4b4ad6d22a9653c29bbbbb53c8e96ae90ca7d29c6ac084e03c58
font_01_sfnt_off00006178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6178 19616 bytes
SHA-256: 57c4d6b7135e8dd27f01b9ba2f6d3e6f49190ed9f8a04fd64fedd0516d29ece9

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