Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda73494568c5111…

MALICIOUS

PDF

41.7 KB Created: 2021-05-13 07:45:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 74817533df6939853c487d69df187021 SHA-1: b4089c629415d3d82228c3c9d522ac2d3f3b3ede SHA-256: fda73494568c5111da287e5af0f487ce97f9dc83cca1acf393ffa583d3e34ad1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, forming a link farm, and includes a call-to-action phrase suggesting a download. The primary URL, https://netcdn.xyz/app/479516143/mcpe-free-download-game-hack, and the numerous related PDF links hosted on kcpb51.ru indicate a likely attempt to direct users to malicious or unwanted content. The ML classifier also strongly flagged this PDF as malicious.

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/479516143/mcpe-free-download-game-hack
    • http://kcpb51.ru/images/is-minecraft-free-on-ps4_GM479516143.pdf
    • http://kcpb51.ru/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdf
    • http://kcpb51.ru/images/promo-codes-for-free-robux_GM431946152.pdf
    • http://kcpb51.ru/images/can-you-host-a-minecraft-server-for-free_GM479516143.pdf
    • http://kcpb51.ru/images/hacks-to-get-free-robux_GM431946152.pdf
    • http://kcpb51.ru/images/free-minecraft-hacks_GM479516143.pdf
    • http://kcpb51.ru/images/how-to-install-minecraft-for-free-on-ios_GM479516143.pdf
    • http://kcpb51.ru/images/minecraft-pe-apk-download_GM479516143.pdf
    • http://kcpb51.ru/images/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://kcpb51.ru/images/coin-master-ids-for-free-spins_GM406889139.pdf
    • http://kcpb51.ru/images/roblox-generator-com_GM431946152.pdf
    • http://kcpb51.ru/images/cool-minecraft-hacks_GM479516143.pdf
    • http://kcpb51.ru/images/coin-master-hack-spins-ios_GM406889139.pdf
    • http://kcpb51.ru/images/how-to-hack-coin-master-game-ios_GM406889139.pdf
    • http://kcpb51.ru/images/roblox-hack-com_GM431946152.pdf
    • http://kcpb51.ru/images/how-to-get-free-robux-no-verification_GM431946152.pdf
    • http://kcpb51.ru/images/minecraft-hacked-client-18_GM479516143.pdf
    • http://kcpb51.ru/images/spin-links-for-coin-master_GM406889139.pdf
    • http://kcpb51.ru/images/coin-master-free-spins-for-today_GM406889139.pdf
    • http://kcpb51.ru/images/minecraft-free-android_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b6.bin
b084a6baca5b06fe78c33d6d2d9bcf94bcbd76efbd58d561fbf7a9d6150f329d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B6 24940 bytes
font_01_sfnt_off000080a6.bin
9a1f81bbc101413fe43a9b313857328452ece1c5d1a1f8b03e9ae928595b3df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A6 18240 bytes

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