Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b24e3cd79690892…

MALICIOUS

PDF

42.3 KB Created: 2021-05-11 20:06:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b6b7cfc7cc2cb58786592112266c5fe6 SHA-1: f90e9e262a94f9a9dc596c52ae3da6f219e0b511 SHA-256: 4b24e3cd796908928990d8fe12a0ca0f528a34cf5e764dfb7f244a06fd4cfb84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and generators. The document body, though partially corrupted, contains references to 'Free Roblox Gift Card' and the malicious URL, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/free-roblox-gift-card-game-hack In PDF document text
    • http://www.cosver.nl/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.cosver.nl/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.cosver.nl/images/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://www.cosver.nl/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.cosver.nl/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.cosver.nl/images/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://www.cosver.nl/images/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.cosver.nl/images/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.cosver.nl/images/how-to-get-free-robux-without-any-verification_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_off00004832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4832 24948 bytes
SHA-256: 5808b3bc17b43e1e1aabd358901baee9d601ae79dc4735dbb344e79cbfb8a473
font_01_sfnt_off000081e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E7 18572 bytes
SHA-256: d6dd878634c6e0bfa0573f8d07d8c04072d5223543faa3ff40eccc306bc8b9ad

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