Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3664a5341bc6758…

MALICIOUS

PDF

49.1 KB Created: 2021-06-07 05:58:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a870a6909bc17d47eebac82935ca8603 SHA-1: 741316e03a5a53f16edcd70d20708dbf3c92d5a7 SHA-256: c3664a5341bc67585132615ed858ec33908ee428ebbb4808bdc6982b85529f0c
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' to lure users. The primary malicious URL identified is https://netcdn.tw/app/431946152/lyce-de-roblox-2-hack-directeur-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/lyce-de-roblox-2-hack-directeur-game-hack In PDF document text
    • http://zagi.hr/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/how-ro-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/generator-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://www.semrush.com/prices/In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000545d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x545D 26024 bytes
SHA-256: 7d82fb3970865483692680a31c3b279ef9a7b385f9516a62907c36580f04dbdf
font_01_sfnt_off0000905c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905C 3016 bytes
SHA-256: 4c3e2db5174821787a4569c9da4979555510caebd15fb9cea35573c139e242bd
font_02_sfnt_off00009ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC0 19020 bytes
SHA-256: f1f8747063b31ae5f747fb4220c80a0c272a531c8247b47b75bc109c1cc96fc0

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