Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c50bdbf2a2c04f…

MALICIOUS

PDF

43.5 KB Created: 2021-05-12 10:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e5ddabd07706c9b393c13d87a2c799e7 SHA-1: 84c41d302e531ba6e16afb8d63c33976dd84f57d SHA-256: 61c50bdbf2a2c04f317f3b6a1c611a19f1ce5699ae56d89026036d07c6ad5a0d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://netcdn.xyz/app/479516143/wurst-client-1.12-2-game-hack', likely hosts a malicious payload. The presence of a 'download button' heuristic further supports the lure of downloading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/479516143/wurst-client-1.12-2-game-hack
    • http://perpustakaan.stikim.ac.id/slims/repository/get-free-robux-com_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/easy-robux-today-com_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-glitch_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/how-do-i-get-minecraft-for-free_GM479516143.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-no-verification_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/facebook-coin-master-free-spins_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-app-real_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/websites-to-get-free-robux_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/200-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-skins-download-free_GM479516143.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/daily-free-spins-coin-master-heaven_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-survey_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/free-foxy-food-coin-master_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-apk-july-29_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins--coins-2021_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048dc.bin
9a987b1c5f2dc8d4456c8dcf207174f0b8bc16fdc71fbe29d94cc5fd4617995f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DC 28696 bytes
font_01_sfnt_off000088e5.bin
311fa6a3c8ed3152b86259a6f2b4fd65ad6ae6b737d77785fc3ef6c3d9292616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E5 18048 bytes

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