Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74d82bde6a19a62…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 13:24:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e0c8f490817bc750f6b84afd0e29f1c6 SHA-1: 1101b14fe6deadbecf645c0f1feaffc660d9228c SHA-256: b74d82bde6a19a6292c43b2ebb6fa38b437448ff83a2d9aa0ce385cb90a2b553
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a primary external link, all related to game hacks and cheats, indicating a lure for users to download potentially malicious content. The PDF_SEO_LINK_FARM heuristic firing suggests a large number of these links were generated programmatically to appear as legitimate content. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this document.

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.tw/app/406889139/free-coins-for-planet-master-game-game-hack PDF link annotation
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-games-to-download_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-mega-matar-gente-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-kick-gui-juin-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-a-roblox-accout_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/cheat-commands-in-giant-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-theme-park-tycoon-2-money-hack-script_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/surveytool-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-install-anti-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-through-a-pending-group-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-tiktok-followers-in-5-minutes_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-2021-android_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-robux-for-free-and-easy_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-c2-roblox_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_off00003359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3359 23000 bytes
SHA-256: ac5e8b982329eb909d9c2928ba1926a4b547e39c842a9498de39a6f00232f894
font_01_sfnt_off000066c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C2 18488 bytes
SHA-256: 13b34200e5b5520fd47930a59568400670b9d06413f895e67b701df6c09d0985

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