Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e417908690c160c…

MALICIOUS

PDF

35.5 KB Created: 2021-07-08 20:47:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cc5a793cbfdecbcc18d3dd4a2c2d381b SHA-1: c86713e064ee8f228db2df715863d7e91c3ff84c SHA-256: 4e417908690c160c5174befaf05de197ee54d1e07d950e91b09581e59c8640f5
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 infrastructure. The document body and heuristic firings indicate a lure for 'game hacks' and 'generators', suggesting a social engineering tactic to trick users into visiting malicious sites. 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/406889139/coin-master-hack-2021-without-human-verification-game-hack In PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-robux-2021-quad_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-how-to-get-robux-for-free-no-hacks_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/robux-hack-game_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-roblox-game-card-generator_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-cheats-for-robux-and-tix-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-redeem-code-free_GM406889139.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
stream_002_off00003078.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3078 23172 bytes
SHA-256: 4fa982d875f814d13f54ecb3c6d052a67dd71dd00856e53144c763779150b6bb
font_01_sfnt_off000064d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D7 19304 bytes
SHA-256: 50dc84c10d645d869955afc3455aa83c13b71772cc2407cfff29c5ba194c25aa

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