Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f41140a4fd40d8…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 03:51:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6a9909168dd339e01bca76b031c6ea42 SHA-1: be3eacdd72cdf776b2253dc4f0a62e8a3d3d696e SHA-256: d2f41140a4fd40d8a4f69356d6be363690a1102d24f896c52ecb13c45eb50874
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 "free generators" and "game hacks" for popular games. The primary redirect URL, https://netcdn.online/app/406889139/how-to-get-coin-master-free-spin-link-game-hack, is flagged as malicious. This indicates the document's purpose is to drive traffic to potentially malicious sites, likely for malware distribution or phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/how-to-get-coin-master-free-spin-link-game-hack In PDF document text
    • https://www.sarsen.net/uploads/files/files/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/spin-coin_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-real-free-spins_GM406889139.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_004_off00004f24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F24 25220 bytes
SHA-256: e980584079eadb226703e7cddd2979c7723800dc23717d178398477957ef192d
font_01_sfnt_off0000892c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 18220 bytes
SHA-256: b2f7f6595bf64a30853f7d52e44db90316d94cc0a70445ac6854799e3a79afd4

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