Malicious PDF — malware analysis report

Static analysis result for SHA-256 645b461613f63dd2…

MALICIOUS

PDF

45.7 KB Created: 2021-05-13 21:11:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9a3207fa16a9c6ab191ef0166d991393 SHA-1: 24cfce4c52143f0f8a84aa5390daf24418a0e494 SHA-256: 645b461613f63dd2cf6a568f9ff89ecaa1259768eb4ac54dd82bcb233de6d61b
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure to trick users into clicking malicious links, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. The embedded URLs, such as 'https://netcdn.xyz/app/431946152/lazyblocks-com-free-robux-game-hack', likely lead to further malicious content or phishing pages. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/lazyblocks-com-free-robux-game-hack
    • http://dana1157.com/images/mcpe-master-coins-hack_GM406889139.pdf
    • http://dana1157.com/images/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • http://dana1157.com/images/coin-master-free-coins-twitter_GM406889139.pdf
    • http://dana1157.com/images/cheating-hacks-for-coin-master_GM406889139.pdf
    • http://dana1157.com/images/is-java-minecraft-free_GM479516143.pdf
    • http://dana1157.com/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://dana1157.com/images/best-free-hacked-client_GM479516143.pdf
    • http://dana1157.com/images/free-spins-coin-master-ios-links_GM406889139.pdf
    • http://dana1157.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://dana1157.com/images/bad-minecraft-free_GM479516143.pdf
    • http://dana1157.com/images/minecraft-pe-apk_GM479516143.pdf
    • http://dana1157.com/images/roblox-free-login_GM431946152.pdf
    • http://dana1157.com/images/free-spin-coin-master-apk_GM406889139.pdf
    • http://dana1157.com/images/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • http://dana1157.com/images/how-to-get-free-clothing-on-roblox_GM431946152.pdf
    • http://dana1157.com/images/coin-master-hack-cheat-generator-d_GM406889139.pdf
    • http://dana1157.com/images/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://dana1157.com/images/hacks-for-coin-master_GM406889139.pdf
    • http://dana1157.com/images/how-to-earn-free-robux_GM431946152.pdf
    • http://dana1157.com/images/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004863.bin
21f87be9a2ac7ff218572a535a059e5b69621a99f0472e754a5bd1bfab2dab64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4863 24752 bytes
font_01_sfnt_off00008125.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8125 3884 bytes
font_02_sfnt_off00008dcc.bin
000d85757c2dbc774c4a4ed19607b9025a632ba167ee8131c5b8e6d7f50f0f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCC 19008 bytes

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