Malicious PDF — malware analysis report

Static analysis result for SHA-256 833e39628db3e868…

MALICIOUS

PDF

44.9 KB Created: 2021-06-07 08:55:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1a880e60aad12b87f77007f7d9009ce2 SHA-1: 76e76dec95b4286a31f18f3ff5330919aeb9dc47 SHA-256: 833e39628db3e8682c8215e24618405eb98693c1a5c0b687a67a1aa0f66e8f41
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, disguised as lures for 'free Robux' or game hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt to redirect users to potentially malicious websites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/free-robux-july-2021-game-hack In PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/moon-active_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/earn-roblox_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-minecraft-mods_GM479516143.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_off000050d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D7 25456 bytes
SHA-256: b4861149e38b8ae18811192678ed38ade8791b0abe5cde74f692ba2b106dc254
font_01_sfnt_off00008b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2B 18836 bytes
SHA-256: a04ff19fdc3117c7ff4a20008e6babd318edf3ed0cb476221ed0ce950dba7569

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