Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08011c84746c4c9…

MALICIOUS

PDF

50.4 KB Created: 2021-06-04 03:55:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 280f2b6b1fe86e92871574d8b9006de0 SHA-1: e357d72fcfc931b294eaa1b015d8846643ac2402 SHA-256: a08011c84746c4c94f6985e803c86d4c5584f3896f339dca4b0c4d631ff29ac1
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains numerous links to external websites, many of which appear to be part of a link farm designed to attract users searching for free in-game items or currency. The document also includes a lure to execute commands via the clipboard, suggesting an attempt to trick users into running malicious code. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • 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
  • 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.online/app/431946152/robux-free-co-game-hack PDF link annotation
    • http://library.imz.or.id/repository/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://library.imz.or.id/repository/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/hacks-para-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000548f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x548F 30556 bytes
SHA-256: 509e0913d731a94d7487908a6f45da8ea7b5138cb7b2eda64dfb8e7b9c335d1c
font_01_sfnt_off0000996f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x996F 2828 bytes
SHA-256: a4e15770ab3b920ccbab17816ac2be280610f3f789d7654b00721cdcc5d65b79
font_02_sfnt_off0000a324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA324 18012 bytes
SHA-256: 3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73

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