Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de204bfb631dafd…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 01:56:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e52c349412ad8e2aa485f5fe89e5937a SHA-1: 612db0475aacfe27c5b4ad019cec44be6c09435c SHA-256: 0de204bfb631dafd240653ad779d3358f9963c44f5ecfcbaf642b28d32444dda
160 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector hosted on 'netcdn.tw', which is flagged as malicious. The document body and embedded links suggest a lure for free in-game currency (Robux) or game hacks, a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

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/roblox-promo-code-to-get-free-robux-game-hack In PDF document text
    • https://www.zagi.hr/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/cheat-hide-and-seek-roblox_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/yin-and-yang-roblox-hack_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/www-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-legit-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-hack-july-2021_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/free-tiktok-engagement_GM835599320.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/jailbreak-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-roblox-hair-boy_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_off00002e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2B 22568 bytes
SHA-256: 43cfc173758e8d6d302b143edeabbfe4be8c20ba63982cb1cb0c81a4c650b0fa
font_01_sfnt_off0000605f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 19480 bytes
SHA-256: 9c60ac484ed4d96c21d417994060880eaf1182fdd7210cd7b39094265f956726

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