Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c8fabf2ea68b6da…

MALICIOUS

PDF

34.0 KB Created: 2021-06-27 02:46:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 579b5c3173bc6acf2e1f442623f6d1fe SHA-1: 1db6f606ba318c5d3b32ce9bc8f7cf8a0e5219fd SHA-256: 3c8fabf2ea68b6dad7ce6cd4a96fd70f14295fb5f346629b002a65bb6ba2dd53
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.003 Windows Command Shell

The PDF document uses social engineering lures related to free Roblox items to trick users into executing commands. Heuristics indicate the document instructs users to copy or paste content into a terminal, consistent with ClickFix attacks. The embedded URL likely leads to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/free-roblox-collectables-game-hack PDF link annotation
    • https://pasca.unisba.ac.id/elibrary/repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-stuff-catalog-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-creeper-chaos-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-make-a-free-vip-server-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/https-wwwrobloxcom-games-2021202196-freeubersummerrewards-go-play-now_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/alone-how-to-get-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-vampire-hunters-2-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-money-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-free-pokemon-clothing_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-a-computer-in-roblox-flee-the-facility_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/como-ser-hacker-en-roblox-en-celular_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/cheat-roblox-roghoul-en-francais_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/fiverr-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/earn-free-robux-on-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_off00002ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC1 22420 bytes
SHA-256: 47afa56bbad64c1e190abea31e33599dd28287b21efd6fe9b3ec31df6672ee16
font_01_sfnt_off00006083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6083 18752 bytes
SHA-256: 859e4dbea1f70c8373b141c1309c65732e4f1b961a4870db534438c3bffe7c7e

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