Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba73443c76a36bd…

MALICIOUS

PDF

46.4 KB Created: 2021-06-04 00:32:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5dcb90a968dc98c42080431c005777e2 SHA-1: fc9120c0bd3eaa2607794d03e55ce1160c3f1038 SHA-256: aba73443c76a36bd25732311016c3654dc2b768c51713ee5b47f5b3deda57102
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized links for game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a download button lure suggests a deceptive workflow. The primary goal appears to be directing users to potentially malicious sites via a link farm, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/free-spin-link-game-hack
    • http://perpus.unik-kediri.ac.id/repository/apps-to-hack-coin-master_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdf
    • http://perpus.unik-kediri.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/op-rewards-robux_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/toolbox-for-minecraft-windows-10_GM479516143.pdf
    • http://perpus.unik-kediri.ac.id/repository/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/free-robux-group-payouts_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/easy-robux-hack_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/free-robux-stream_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spins-link-app-download_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spins-8-14-2021_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/coin-master-daily-free-spins-today_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/free-coins_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/can-you-play-minecraft-for-free_GM479516143.pdf
    • http://perpus.unik-kediri.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000507f.bin
8f079548461addd0c5227e73e1fb0c024bd0fe5d4a9c20d24d070da1d55cd744		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507F 24836 bytes
font_01_sfnt_off00008a22.bin
a0e4a5f378f23ac829e40ef1a0638115ffab18b17acd7561ed9b637601232063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A22 3124 bytes
font_02_sfnt_off00009505.bin
3affe4290d3c586f8abc652f24a5d7e7753726cbbd633ecc9a81f23a594e743c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9505 17580 bytes

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