Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b3e9d07e63bcaf…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 18:50:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7918b201e0f10e5252817846924c8a1d SHA-1: 06565ade64a055b5e57778698313b3acc9d97e99 SHA-256: f0b3e9d07e63bcafb4e98699477ccc4814baf2020d5db51af2b0a0c8e48ccc36
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a prominent link to 'wurst-1.8-game-hack' hosted on netcdn.xyz, suggesting a lure for downloading potentially malicious software. The PDF also exhibits characteristics of a link farm, with numerous external links, and is flagged by a machine learning classifier as malicious. The presence of a 'download button' heuristic further supports the malicious intent.

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/wurst-1.8-game-hack PDF link annotation
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5A 25468 bytes
SHA-256: d3b017151214c140655b9e4bec723ac2c38509ca6ac90eb8c6fb85e504853763
font_01_sfnt_off00008484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8484 17940 bytes
SHA-256: 9ddf50010538257863564cc063c7bcca2c638885d8ca6ab03dd967993225e6a2