Malicious PDF — malware analysis report

Static analysis result for SHA-256 6217d74182006f35…

MALICIOUS

PDF

36.2 KB Created: 2021-05-22 01:15:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f88cb58675e84dd727f748bd0bb99ee1 SHA-1: ccdafb57ff634a8f9c721ce8f0b57ff439b60ba0 SHA-256: 6217d74182006f35d19789f9a306b26fa2855a8e09dfa313bcf33e7a7feae5f7
82 Risk Score

Malware Insights

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

The document presents itself as a lure for 'Free Robux Promo Codes' and contains a fake CAPTCHA or human verification prompt, indicating a social engineering attempt. It embeds multiple URLs, including one pointing to a potential payload download at `https://netcdn.xyz/app/431946152/free-robux-promo-codes-game-hack`. The presence of these elements strongly suggests the document is designed to trick the user into executing further malicious actions, likely involving downloading and running a second-stage exploit or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/free-robux-promo-codes-game-hack PDF link annotation
    • http://nalmpantistractors.gr/images/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-microsoft_GM431946152.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_off00003066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3066 26484 bytes
SHA-256: fef5349db809ce93a55d5b652dc6bdff1c79017a6a90ce44ab1382e30748013e
font_01_sfnt_off00006b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B27 18604 bytes
SHA-256: 81df952e11a915931eb8909d89f5eda5fa0aae9cee1bf8eea3735c5794fb3fb4

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