Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20b967c1350d95b…

MALICIOUS

PDF

41.5 KB Created: 2021-05-18 05:20:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0e49e1827cfb17b1dd1658b92f378115 SHA-1: 66891df8f9e9907c8a12a6e4df3ce43e8233f992 SHA-256: d20b967c1350d95b48156583f7b482ffcb4dddd482ed32eea7992a033205611c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL and numerous other URLs within the document body suggest a lure for downloading potentially malicious content or engaging in scams related to games and free items. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/200-free-spins-coin-master-game-hack
    • https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-pe-free_GM479516143.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/fb-coin-master-hack_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-apps-that-work_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-get-minecraft-java-for-free_GM479516143.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/master-coin-free-link_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-generator-2021_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-safe_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-coin-master-cards_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-com_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/mcpe-master-coin-hack-apk_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-spin-link-coin-master-today_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/rbxfree-com-free-robux_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-free-spins-apk-2021_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-glitch-2021_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-unlimited-robux_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/daily-free-spins-coin-master_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/robux-hacks-2021_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/buy-robux-free_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-spins-coin-master-generator_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000489c.bin
8f890022ab68d6519a1d122803330fd2c0cdd206443c510047ec3d907a4fe3cf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489C 25200 bytes
font_01_sfnt_off0000802d.bin
322b0d5b629f6df55fd3c77851cbfe7ee71104dfe1b9214827344950ced1d0df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x802D 18180 bytes

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