Malicious PDF — malware analysis report

Static analysis result for SHA-256 debe4392cdca2d8e…

MALICIOUS

PDF

44.0 KB Created: 2021-05-14 01:07:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d0f693c1d5167b07fbbad20baa10b61a SHA-1: adcf7e91f0c613ec15637874fd9742611d529ae7 SHA-256: debe4392cdca2d8e02fa7048dd7fcd1faacc0574955cbfc16978723118635604
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to sites offering 'free generators' and 'game hacks', a common lure for phishing or malware distribution. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous malicious redirector links suggests the document's primary purpose is to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/robloxbux-us-generator-game-hack In PDF document text
    • http://damvallei.be/images/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://damvallei.be/images/robux-offers_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://damvallei.be/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/roblox-hack-com_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_off0000471d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x471D 27644 bytes
SHA-256: 00f09d6d3d9d5a92715cd7bfb81801967c0b0cf6483c93bf5f678f5a53546e69
font_01_sfnt_off000084c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C6 19816 bytes
SHA-256: b08f51ee1b152491ec2df50e3cb65fd4be8e328311015c97f4a22387fdfb76f6

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