Malicious PDF — malware analysis report

Static analysis result for SHA-256 67163c81e5cdd98c…

MALICIOUS

PDF

45.1 KB Created: 2021-05-13 14:01:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c9fd682ee5235262ecb8e614e70955ee SHA-1: 309442da5a50639f8924e0ab9dce8b7f37a8a547 SHA-256: 67163c81e5cdd98cc214ba55ba045addf4936a1be911533acf5a33e50bdfaf78
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising "free generators" or "hacks" for popular games. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-online-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/coin-master-free-online-game-hack In PDF document text
    • https://pierrefabre-newsletters.gr/images/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://pierrefabre-newsletters.gr/images/robux-free-gift-card-org-hack_GM431946152.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_off00004b02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B02 25848 bytes
SHA-256: 02da737e907d6ccd91e448d6067243bfe7c30c6c57bbcad85566a31e7567d37e
font_01_sfnt_off00008573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8573 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F25 17784 bytes
SHA-256: 5cb4b072a296e1d0a116510b6a928a0a81b450dccfe828cef627c6c52934b7a2

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