Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd6152817e939d9…

MALICIOUS

PDF

48.7 KB Created: 2021-05-12 12:15:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2cc3ef46a1c5854cd7acab3ce545651c SHA-1: 1b16b8ce372e03f449b39e9c3a2aa2eef41123d6 SHA-256: afd6152817e939d9090e5a72e49cfec9dfc33f85574d6d8110809404158eef2d
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a download lure, aiming to trick the user into downloading a file. It contains multiple embedded URLs pointing to external resources, likely for hosting the payload or related content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/coin-master-hack-mod-apk-unlimited-spins-game-hack
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-coins-app-for-coin-master_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-master-free-spin-27_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/roblox-skin-free_GM431946152.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/rbl-gg-free-robux_GM431946152.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-spin-link_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/best-tricks-co-robux_GM431946152.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-master-claim-free-spins_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/mcpe-master-coins-hack_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/get-free-coin-master_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/hack-coin-master-without-verification_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-master-coins-free_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/how-to-get-free-unlimited-robux_GM431946152.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/robux-hack-generator_GM431946152.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-master-free-cards_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-master-spins-gratis_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/robuxmatchcon_GM431946152.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-master-spin-link-today_GM406889139.pdf
    • https://milagrosjogja.com/ckfinder/userfiles/files/robux-generator-no-human-verification-or-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b04.bin
c08a1dac2b648be0a9f9f846898362938185dc06bea782d7ac62e4d201ff84e6
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B04 30212 bytes
font_01_sfnt_off00008ecb.bin
c06110b2c89fc31b2d6db8384761f5c3583c1820098d0ad87b46d75c0f0cb543
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECB 3544 bytes
font_02_sfnt_off00009b50.bin
18de0d3395175a01182e22f6397e1dac7410efb25a7e1b1cdc961642bba379c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B50 18584 bytes