Malicious PDF — malware analysis report

Static analysis result for SHA-256 452463f88cf36d59…

MALICIOUS

PDF

32.5 KB Created: 2021-07-21 04:32:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 25d77b248746dfaf470378ea4d7cd117 SHA-1: fde51e6252e2a2de523e53778e337a6c97235fe9 SHA-256: 452463f88cf36d593a575247d3124a0aa89d3c386a2a3873d47903e7c9a192cc
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a call-to-action button, aiming to trick the user into clicking a link to download game cheats or hacks. The embedded URLs point to domains hosting such lures, suggesting a phishing or social engineering attack. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/479516143/minecraft-free-download-unblocked-game-hack PDF link annotation
    • http://ristorantimaculan.it/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://ristorantimaculan.it/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://ristorantimaculan.it/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://ristorantimaculan.it/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://ristorantimaculan.it/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF9 22116 bytes
SHA-256: 1959f0cbe4048a0a28aeee7791ba3a1fc195c7c45231966cfd65c326962c549f
font_01_sfnt_off00005b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8F 18804 bytes
SHA-256: 351b73efa1cf4358b07b283040b01ec481d6b0b50516ad4f4e94e13994b713ed

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