Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad76536a327af66…

MALICIOUS

PDF

32.7 KB Created: 2021-07-01 15:46:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d57b4be795fa35416b3749286e8a5240 SHA-1: d5bb61ad972b8d1d3c5e22d1eeb2e27574e01c90 SHA-256: 5ad76536a327af666aeeee35b039ce54d175d8524555370a375bd3cccca15fa6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector hosted at http://netcdn.co/app/431946152/kazok-free-robux-game-game-hack, which is flagged as malicious. The document body and embedded links suggest a lure for free game currency or hacks, a common tactic for distributing malware. While no scripts were explicitly extracted, the PDF structure and malicious links indicate an attempt to redirect the user to a harmful site.

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/kazok-free-robux-game-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/free-code-robux-no-fake-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/escape-school-obby-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-cheat-engine-63-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/best-roblox-mmo-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-hack-2021-august_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-everything-in-eletric-state-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/2021-roblox-hack-team_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/broken-bones-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-promo-codes-thumbnaill_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-the-zombies-code-roblox-dance-simulator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/assassin-roblox-lag-cheat_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/launcher-hack-roblox_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_off00002959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2959 22036 bytes
SHA-256: ada607b4ab842aa5e00dbce207d3e3ed732177230093696445f19d1fcbfabc40
font_01_sfnt_off00005a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A52 19228 bytes
SHA-256: 12a26598058d045f2553db28564acac3bd90b638171fcf1cf5c9667e7803939d

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