Malicious PDF — malware analysis report

Static analysis result for SHA-256 689f0d594ae3dd63…

MALICIOUS

PDF

33.4 KB Created: 2021-06-29 07:37:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc8bed14aaa3f65e57b749224aee0593 SHA-1: 598105002296d43199be128b2c20323342765df1 SHA-256: 689f0d594ae3dd632521f09a8e2ca633e83d14c2a9f7292315fec28731f1940d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with one prominent link leading to a known malicious redirector infrastructure. This link is presented as a 'free generator / game hack' for Roblox, a common lure for phishing or malware distribution. The ML classifier also strongly indicated maliciousness. The primary goal appears to be directing the user to a malicious site via a deceptive link.

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/hack-roblox-descargar-pc-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-hats-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cheat-codes-for-roblox-pumpkin-carver_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hockey-mask-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cheat-roblox-lifting-simulator_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cryptic-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-dominus-roblox-event_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-how-to-noclip-cheat-engine-feb-2021-mac-apple_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-on-phone-no-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-piano-player-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-use-cheat-engine-without-roblox-shutting-down_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robux-hack-game-guardian_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/game-guardian-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-avatar-the-last-airbender-level-hack_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_off00002cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB0 22108 bytes
SHA-256: a18d2f4a0e8471bbe59f90d70b8e3ef1ed61d76c814adc94de9e8c4537094c9e
font_01_sfnt_off00005d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D85 18980 bytes
SHA-256: d10778378b17c820b4172743256768cc99fa0bcb5bb04931fa05b2cece39656a

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