Malicious PDF — malware analysis report

Static analysis result for SHA-256 935c3fc9582645fd…

MALICIOUS

PDF

40.5 KB Created: 2021-05-20 13:34:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d34fdacf15ad25f1fa0532e2d2f80865 SHA-1: d1316ffd79f43ae38b0c33ad799921ca95f107b3 SHA-256: 935c3fc9582645fd5c6e2cd080c7b03fd217a3dbdc84a536d81a60f9836a04b2
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a prominent "CLICK HERE TO ACCESS ROBLOX GENERATOR" call-to-action, which is designed to trick users into clicking malicious links. The embedded URLs point to external resources that likely host further malicious content or downloads. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7718

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/hacks-for-roblox-prison-life-game-hack PDF link annotation
    • http://www.sourceit.llc/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sourceit.llc/uploaded_files/userfiles/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3238 26144 bytes
SHA-256: c852ff9cff6677cc78db395fd08199deb0a140d5f044d6111eb9a0d18a7eb29a
font_01_sfnt_off00006f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F75 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00007c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1D 18620 bytes
SHA-256: e3f2ecfa212854396a9435be993bd19ffc5a7ead26ebe64f65252827dfac6040

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