Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea619980964f5d7c…

MALICIOUS

PDF

45.1 KB Created: 2021-05-12 05:33:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4b4fbb1d6279822413862b6e91e0acf7 SHA-1: f63fd9890a427b95910c440cceccfee8a0e4655a SHA-256: ea619980964f5d7cb7cdba2f7dbe5da2d9d5f18df85d36059cc92680ad6940c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious domain, masquerading as a 'Coin Master Hack' generator. The heuristic firings indicate that the PDF links to known malicious redirector infrastructure and employs a lure for game hacks. While no scripts were directly extracted, the embedded links and the nature of the lure suggest an attempt to drive users to a malicious site, likely for further exploitation or credential harvesting.

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-hack-2021-download-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/2021-free-spins-coin-master_GM406889139.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_off000049b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B3 25024 bytes
SHA-256: 4a4c79c03577ffff0e50b89d02bd7f9ca0063db7a8825b491e51d9a0100e6e40
font_01_sfnt_off000082a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A8 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5A 18696 bytes
SHA-256: 01e33fa384fcd9559826a4aa1de189e20085b3e2fa6b70097625b29721cffd1e

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