Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db335068d5e30f9…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 16:17:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ffda2fe3d63d5aef02148dd7dd30661f SHA-1: 20aa021cf15b466ee9802b1f1a9af925166c9755 SHA-256: 9db335068d5e30f9966e70bad0e4bf89aaa7f2479379aae1bffc13a68877ab90
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link that redirects to a URL associated with malicious redirector infrastructure, specifically designed to lure users with promises of free game hacks. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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.tw/app/431946152/earn-free-robux-on-roblox-game-hack In PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robuxgg-hack_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robux-games-on-roblox-link_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/cool-items-roblox-free-and-how-to-get-them_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/roblox-aimbot-hack-2021-august_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/military-base-roblox-free-model_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/nitro-fun-cheat-codes-roblox-id_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/voodygamescom-robloxhacks-5_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-to-hack-roblox-to-get-expensive-stuff_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/roblox-robux-hack-tool-generator-lev-les_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/roblox-how-to-get-free-clothes-without-bc_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-do-you-get-free-robux-instinly_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robux-no-survey-ipad_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/jack-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/hack-de-prision-life-en-roblox_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/bin-xterm-pastebin-free-robux_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_off000031b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B0 22012 bytes
SHA-256: 3e4488985e2076dc734c617f69b08931f477ab670c2331a52bccc09a57e8824c
font_01_sfnt_off0000626a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626A 18788 bytes
SHA-256: af3555bc1f517b69886570aade67a9791766090da4e1e41d0d69d2926e00b478

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