Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c725a27658da9d1…

MALICIOUS

PDF

35.3 KB Created: 2021-07-07 16:42:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9a0e6f5c346da4c37f7b62d7b0d1a5cc SHA-1: 058a2c51939a936df0260130b77305558594f3fb SHA-256: 3c725a27658da9d12eb1214efd4ecd21d8bbf0f53442d84e8b7b51d0446ae7c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous links to websites promising free in-game currency, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URIs further supports a malicious intent to redirect the user to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-to-get-free-spins-and-coins-on-coin-master-game-hack In PDF document text
    • http://atrax.hr/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-tiktok-coins-for-free_GM835599320.pdfIn PDF document text
    • https://www.atrax.hr/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/we-hack-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/simple-hack-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/comment-installer-un-cheat-sur-roblox_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-hack-2021-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-robux-easy-on-computer_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/roblox-nike-free-auttaucollant_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/roblox-account-free-password_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_off00003303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3303 23012 bytes
SHA-256: 1f7432f20fd1e4a1990b8838d0ed49592feb107245b7eca753e334e872be54ce
font_01_sfnt_off0000669e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669E 18512 bytes
SHA-256: b5acc537c59d1b7fb5e9a8b7451230baa0910c2ee96a0f773c75b2c56351fbac

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