Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4d5f0e0b8d23f9…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 23:59:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 75474366942b8772f3e59627fd799b3d SHA-1: dbeaea06d648939986832a12f3de8f8be121bcbf SHA-256: 7b4d5f0e0b8d23f986c7ef4e27d4d5bcf62645f3141ec1234002f982d214cb31
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links and a direct download URL, suggesting it is designed to trick users into downloading potentially malicious files. The ML classifier strongly indicated maliciousness, and the presence of a "download button" heuristic further supports a social engineering attack. The document body and extracted URLs indicate a lure related to game hacks and cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/download-kranberry-roblox-hack-game-hack PDF link annotation
    • http://hosoffices.com/ckfinder/userfiles/files/roblox-x-hack_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-get-free-robux-images_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/roblox-real-hack-robux-real-encrypted_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/wurst-mc_GM479516143.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-roblox-giftcards-not-used-100_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-codes-for-skywars-in-roblox_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/get-free-catalog-items-roblox_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-with-no-human-verification_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
font_00_sfnt_off00003174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3174 22392 bytes
SHA-256: e39e7ff4f41bd99c57e3eb871b3fd375ee9cb148713380c7555490d8ffcaa6fc
font_01_sfnt_off0000631d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631D 19344 bytes
SHA-256: 15bd0bb5118a0d18fe7bb3d4fa60a1246c0629785cf4083a5391da5d4ca0b761

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