Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76f406d93b7f3f4…

MALICIOUS

PDF

43.3 KB Created: 2021-05-17 14:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9a3d237b05d9e01f9da8938b1f267b6d SHA-1: 1823de31c6d1ffd5767f4a665d918d5257684c25 SHA-256: e76f406d93b7f3f4a9678fc5049bc513c8f1fd6b024a185eb355167b7ec9afc5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free generators" and "game hacks" to lure users. The primary malicious URL identified is https://netcdn.xyz/app/406889139/hack-coin-master-online-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow, likely leveraging embedded JavaScript for the redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/406889139/hack-coin-master-online-game-hack In PDF document text
    • http://prodajalec.si/images/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://prodajalec.si/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://prodajalec.si/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://prodajalec.si/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://prodajalec.si/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://prodajalec.si/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://prodajalec.si/images/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://prodajalec.si/images/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • http://prodajalec.si/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://prodajalec.si/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://prodajalec.si/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://prodajalec.si/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://prodajalec.si/images/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://prodajalec.si/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://prodajalec.si/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://prodajalec.si/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://prodajalec.si/images/rbx-sites_GM431946152.pdfIn PDF document text
    • http://prodajalec.si/images/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://prodajalec.si/images/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://prodajalec.si/images/coin-master-hack-2021-download_GM406889139.pdfIn 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_003_off000046fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46FA 24260 bytes
SHA-256: 22193f4ffe7b150d64f24e4f3ddd41d36dcc4faf532b8616b34066b15cb115fd
font_01_sfnt_off00007e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E32 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000087e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E3 17788 bytes
SHA-256: e0e539ae1db8c03a1be4e251235a7cd5530d910df9e974361113a9fde74a9cf4

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