Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37a823f5baae87a…

MALICIOUS

PDF

41.7 KB Created: 2021-05-19 02:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1693cf9b78d46aacfd449692886b0d38 SHA-1: aec7192c79a66bd185f7b90dfe5861928ef7d116 SHA-256: f37a823f5baae87ae5a023bd76e7bfa1b89620bcd40a270991816fc8ee4fca7f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to external websites, many of which appear to be related to game hacks and free in-game currency, suggesting a lure for users. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these external links, and the 'ML_NYX_PDF_MALICIOUS' score is very high. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/1094591345/pokemon-go-free-9-nerf-game-hack
    • https://repository.umgo.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-minecraft-servers-to-join_GM479516143.pdf
    • https://repository.umgo.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-robux-script_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/minecraft-realms-free_GM479516143.pdf
    • https://repository.umgo.ac.id/repository/roblox-army-free-robux_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/get-free-spins-coin-master_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/robux-offer-wall_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/robux-fun-hack_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/mcpe-master-coins-hack-download_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/hack-to-send-gold-cards-on-coin-master_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/coin-master-fan-club_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-robux-sites-2021_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/80-free-spins-coin-master_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ab.bin
af9322c17db3e1014628c09c0700b2b778402324a8f9e2dfd35c71c2fc3cf99e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AB 24524 bytes
font_01_sfnt_off000081c2.bin
b708b6a2b78264f946d2807f41490aefec6605c171313444d27551169673e2fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C2 18004 bytes

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