Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c86a4930c774a9…

MALICIOUS

PDF

45.8 KB Created: 2021-05-16 00:33:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8acd7d590534536eadbb3fe8367d94c8 SHA-1: 36c6c1f3b4a6f946c647dd252c0619ad672f9aaf SHA-256: 79c86a4930c774a9311cfeacd27e6ddc0cb905e487abfa280323d409c6cede34
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and text that strongly suggest a lure for users interested in 'Coin Master' or 'Robux' hacks. The primary malicious link, 'https://netcdn.xyz/app/406889139/coin-hack.hub-coin-master-game-hack', is flagged as a known malicious redirector. The presence of a visual download button heuristic further supports the malicious intent of directing users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 3

  • 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-hack.hub-coin-master-game-hack In PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-premium-roblox_GM431946152.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_off000048f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F9 29368 bytes
SHA-256: 338f914dab06e5e7d913c749b2ea5f4d6210fc25dbbe19fac9f5b49c5495b276
font_01_sfnt_off000086e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E7 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9098 18248 bytes
SHA-256: 616583cf15db0724850cf45359e902df9ac37466b92a112f25d4f28d3793db9e

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