Malicious PDF — malware analysis report

Static analysis result for SHA-256 dafc3df15d1d1362…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 11:11:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dddf526cb5c1d95a011434dc6b3932b6 SHA-1: b36ad82a46c92f8250b11e6c81a23299f3822742 SHA-256: dafc3df15d1d1362079361e3b8ada57ba1ff0ca87469c962ce0210d5be3bffce
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many of which are SEO-optimized and point to game-related hacks and cheats. The primary URL, 'https://netcdn.online/app/406889139/descargar-coin-master-hack-game-hack', suggests a download lure for a game hack. The presence of a PDF link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/406889139/descargar-coin-master-hack-game-hack
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/real-free-spins-for-coin-master_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-link-march-2021_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/coin-master-game-hack-kaise-kare_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/coin-master-free-coins-link_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/roblox-robux-generator-2021_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-free-hair-in-roblox_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/coin-master-32-hack-apk_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/how-to-win-free-robux_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/rbxcity-free-robux_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/claim-free-robux_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/daily-coin-master-free-spins_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/free-robux-come_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/how-to-hack-coin-master-using-es-file_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/free-coin-master-spin-and-coin-link_GM406889139.pdf
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.html
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005126.bin
461a308327f3cac7f8d5278224b4ea67f7aa192b7af55602e390da4a2f7607c0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5126 24104 bytes
font_01_sfnt_off0000884c.bin
30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884C 2840 bytes
font_02_sfnt_off000091ff.bin
1ac54db8c23843d1dfee11abb29d606f45d145995cc15af9d9727a15a7e37246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FF 19212 bytes

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