Malicious PDF — malware analysis report

Static analysis result for SHA-256 5977ffdcc28f2146…

MALICIOUS

PDF

42.1 KB Created: 2021-05-13 03:04:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 64cb6c27702c64ddeada5ec4b87438a3 SHA-1: 1781ebb7932185785e3a7b4cb6f51a989b5bce74 SHA-256: 5977ffdcc28f21464a833ceff3459aa852fe0e37c6b85c497b3026b0568ed4d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising "Coin Master Facebook Hack" and other game-related cheats. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-facebook-hack-game-hack, which is likely used to deliver a second-stage payload or phish for credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful content.

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/406889139/coin-master-facebook-hack-game-hack In PDF document text
    • https://dolphintour.vn/images/uploadsfiles/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-devil_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-rape_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-come_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_off00004991.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4991 25176 bytes
SHA-256: 460d8828a083cd8d2369908f3e4f63d4e6e0b802c6cf01310e9bc5a77611e333
font_01_sfnt_off000082fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FD 18040 bytes
SHA-256: 061f1859a06f64f15b62312cec33f4d1ae20d2ec323f296e754baff4e0335bc5

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