Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a76aa35e835709…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 02:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: be51f05b79b3c2af4844deb2c1ecdc1d SHA-1: d593b8746a4e6beef399608f4f5950b2f40f97cd SHA-256: 40a76aa35e835709aa1f4b330c23f5d2b52446992a3d6c91046335fb7fc9f62f
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 advertising game hacks and free currency for popular games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs confirms a redirection attempt. While no scripts were explicitly extracted, the nature of the lures and the redirector infrastructure suggest the intent is to lead the user to a malicious site, likely for phishing or further malware delivery.

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/roblox-sued-game-hack In PDF document text
    • http://www.access-coiffure-tours.fr/images/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/robux-gratis_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/roblox-robux-generator-tool_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
stream_003_off00004a8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8E 24752 bytes
SHA-256: 56b9aa637bce057693df98afbf5ee5bfa8738be7f5b8f32a841e238c6c5564fe
font_01_sfnt_off000083c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C3 18100 bytes
SHA-256: ceb05d308fc17805291ab9e53434ca96f69a4d98ec9d0cd75399c721fdce8c16

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