Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ccfdd7944d02ccc…

MALICIOUS

PDF

36.5 KB Created: 2021-05-24 04:41:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 20f0aa7b6ee3a363311bbb78d6d8f226 SHA-1: 017f222efa2d5a5b83e47e7d029005338bfa5f90 SHA-256: 9ccfdd7944d02cccbb5038740d69a5e5f734126f45d3a0553cd9e4739310bf3c
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into clicking a link, which is a common social engineering tactic. The embedded URL and other extracted URLs point to sites offering 'free Robux' or 'game hacks', further supporting the phishing and potential malware distribution intent. While no scripts were directly extracted, the PDF structure and external links suggest it may facilitate the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/get-free-robux-2021-game-hack PDF link annotation
    • http://nalmpantistractors.gr/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/how-to-hack-roblox-for-robux_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
stream_002_off0000327c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327C 25896 bytes
SHA-256: 8be8f34803794e18f55664f3ca679c490ea497dce598ba02d90b5f7ccc2a8fce
font_01_sfnt_off00006ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA1 18520 bytes
SHA-256: 6fe0ff66a16b6ee6dc50657e9361d5c62c74e6da0263e26ac7f67f588141101f

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