Malicious PDF — malware analysis report

Static analysis result for SHA-256 3607d9320fb16872…

MALICIOUS

PDF

32.8 KB Created: 2021-06-28 13:07:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a13bc7e5806001ec11f647212c4bde93 SHA-1: 5e4a9262afb239dc4bdee414bfbfef3f6fb70909 SHA-256: 3607d9320fb1687279e7d9483282b00d6c1162dc514ecb71926a82f0d7ae4a0b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users with promises of game hacks and free in-game currency. The primary link, http://netcdn.co/app/431946152/how-to-make-group-in-roblox-for-free-game-hack, points to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack aimed at users interested in online games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-make-group-in-roblox-for-free-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/pokemon-go-free-hack_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-glames-with-gliders-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/robuxian-com-free-robux-code-generator_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-hack-mad-city-roblox-and-teleport_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-noclip-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hacks-to-insert-in-roblox-console_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-shirt-free-edit-avatar_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/howto-get-robux-for-free_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
font_00_sfnt_off00002a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A66 21736 bytes
SHA-256: e4029106517e29a224e4ad31b13ecab6818b12b8549e1f8e0baed4917cabb625
font_01_sfnt_off00005a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A27 19496 bytes
SHA-256: f67f658a245ebe8cc3c3346663fcd25f8b9666448e9fe358ba572787630046a3