Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8ab666a90b953f…

MALICIOUS

PDF

34.4 KB Created: 2021-06-27 09:23:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dd64f88f69933930bc85e305a6bf30cd SHA-1: ba787cc5d37f59d93769aecd21fe664f76b974e3 SHA-256: 8c8ab666a90b953fed0f1b33ee413fb4e7c465c4c5e8b02bf722a92ac868e37a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically advertising free game hacks and generators. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a 'free generator / game hack' for Roblox, which is a common social engineering tactic to drive traffic to potentially harmful sites.

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/learn-lua-roblox-free-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-apk-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/robux-how-to-get-without-glitch-or-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-dragon-ball-after-future-clicker-script-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/tiktok-free-100-followers_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/cheat-engine-works-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/tiktok-free-like-trial_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/robux-website_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-vpn-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-for-no-cost_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-without-downloading-apps-on-ipad_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000301d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301D 22420 bytes
SHA-256: 5b3375b1ddea9acc2a0999acdfa715335bb4c187e9f7aaba9e8731f4911b2105
font_01_sfnt_off0000623f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623F 18788 bytes
SHA-256: 55ea5ffb2641bd9c862ac33e3c5e15a178a95a04732787aec2c7236262f9213f

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