Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a567a573c9f4244…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 00:24:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 898d7797587e424c13acde796bc6626c SHA-1: d439bb3414a080332254d2235d17a9885f030b65 SHA-256: 5a567a573c9f4244df5eeb9c7ef01669f778ce74be6c06d33f30da4281a79f67
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA to trick users into clicking a link, which is a common social engineering tactic. The embedded link leads to a URL that offers a 'Coin Master Hack', suggesting the document is a lure for downloading potentially malicious software. No scripts were extracted, but the presence of external URIs and the fake CAPTCHA heuristic strongly indicate a malicious intent to trick users into downloading a payload.

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/coin-master-hack-apk-android-game-hack
    • http://studio-dentistico-fiume.com/files/coin-master-free-spins-blogspot_GM406889139.pdf
    • https://www.studio-dentistico-fiume.com/files/is-roblox-free-on-pc_GM431946152.pdf
    • http://studio-dentistico-fiume.com/files/minecraft-hack-2021_GM479516143.pdf
    • http://studio-dentistico-fiume.com/files/free-robux-just-enter-username_GM431946152.pdf
    • http://studio-dentistico-fiume.com/files/roblox-comcom_GM431946152.pdf
    • http://studio-dentistico-fiume.com/files/coin-master-free-blogspot_GM406889139.pdf
    • http://studio-dentistico-fiume.com/files/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-spin-app-iphone_GM406889139.pdf
    • http://studio-dentistico-fiume.com/files/roblox-getting-hacked_GM431946152.pdf
    • http://studio-dentistico-fiume.com/files/games-that-give-free-robux_GM431946152.pdf
    • http://studio-dentistico-fiume.com/files/free-minecraft-com_GM479516143.pdf
    • https://www.studio-dentistico-fiume.com/files/roblox-free-robux-hack_GM431946152.pdf
    • http://studio-dentistico-fiume.com/files/free-robux-no-survey_GM431946152.pdf
    • https://www.studio-dentistico-fiume.com/files/robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://www.studio-dentistico-fiume.com/files/free-roblox-hack-us_GM431946152.pdf
    • https://www.studio-dentistico-fiume.com/files/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdf
    • http://studio-dentistico-fiume.com/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://studio-dentistico-fiume.com/files/rbxoffers-com-free-robux_GM431946152.pdf
    • https://www.studio-dentistico-fiume.com/files/pasos-para-hackear-coins-master_GM406889139.pdf
    • https://www.studio-dentistico-fiume.com/files/coin-master-hack-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bee.bin
fd2a0dd2868e830f4c36710477ed5cc2000b95790180fefaaeb3b6258e40ae19
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BEE 23920 bytes
font_01_sfnt_off00008237.bin
826b659b6d6a919198e40a4f05f943b2342615ea87152df5852563aa56c598f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 18068 bytes