Malicious PDF — malware analysis report

Static analysis result for SHA-256 f289c5f4c92e0b3d…

MALICIOUS

PDF

43.7 KB Created: 2021-05-14 19:00:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c3ef99cba85ec1c1aeef004ad229c554 SHA-1: a20f2ba49a6684ebfd0ba40243de621539fdf2f4 SHA-256: f289c5f4c92e0b3d87d2104063bf48b9ff7b96cb75ab3fdf504a67a715de24d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising free game currency and hacks for popular games like Coin Master and Roblox. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spins-today-daily-links-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially malicious 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/406889139/coin-master-free-spins-today-daily-links-game-hack In PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/robux-gainer_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-get-free-robux-without-human-verification-2021_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_off000049ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EA 26188 bytes
SHA-256: 67edf6b562cdbd483ae4cc6e483556beffd882b25736797dd852d2e0b064ee67
font_01_sfnt_off0000876e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x876E 18652 bytes
SHA-256: 52d597ff4b9023df6b3510b92f87dc1d2329aed0448bc9fa59130058567cb992

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