Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa64ae9699f23b76…

MALICIOUS

PDF

47.5 KB Created: 2021-06-07 09:28:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bbb447dde34157abe7becb84f8bbc4cc SHA-1: 61cfa0eaff2c79d77d33250f58cd718cb760777e SHA-256: fa64ae9699f23b76a365379c2060c7935b3e838dca9622494e80c462b6e1b74d
82 Risk Score

Malware Insights

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

The sample presents a fake CAPTCHA to trick the user into interacting with a malicious link. The primary external URI identified, https://netcdn.tw/app/431946152/free-item-game-roblox-game-hack, is highly suspicious and likely leads to a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/free-item-game-roblox-game-hack
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-food-on-coin-master_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/free-disney-plus-accounts-tiktok_GM835599320.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/coin-master-free-coins-2021_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-jailbreak_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/apk-coin-master-hack_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-apple_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/will-minecraft-dungeons-be-free_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/classic-minecraft-net-hacks_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/robloxheroxyz-free-robux_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/rbxfree-com-free-robux_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/robux-offer-wall_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/coin-master-links-to-get-free-spins_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/games-in-roblox-that-give-you-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005241.bin
8064880c1066e061a93bad9876e3beda515d7e0c6deccb9c9b3645e2c733a393		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5241 24288 bytes
font_01_sfnt_off00008998.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8998 3884 bytes
font_02_sfnt_off00009640.bin
191e90ec35b46b7e31d9af76f1d11cddb4a06dd9833573db074edfea61d39437		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9640 18540 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.