Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d07a4bdc87a283…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 20:27:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ca2cdd06b2724ae8aff86a698b42aba9 SHA-1: 6e69798070c33b9a871e85ebd2ce4dabdb4eec98 SHA-256: d5d07a4bdc87a283769b90a4ae44d0cfa43944524aded9fa86d358b313a32332
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'hacks' for popular games. The ML classifier strongly flagged this PDF as malicious, and heuristic rules confirm the presence of known malicious redirectors and a lure for downloads. While no scripts were extracted, the document's primary function appears to be directing users to potentially harmful external sites.

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-daily-free-spin-app-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/bc-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-swordbust_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-spped-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/ben-10-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-u-roblox-items_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/haktuts-coin-master-free-spins_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
font_00_sfnt_off00002e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8C 22544 bytes
SHA-256: 0376f351ab62be3dce6a50df3a71e8b8f71b84b83662c434f6ed24b85c68f6ad
font_01_sfnt_off000060bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 18596 bytes
SHA-256: c60f148968409d87350eea64826c1d5db15a758400e2fd6cc53d8dcea5acf3a2

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