Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22b3691c016c594…

MALICIOUS

PDF

32.0 KB Created: 2021-07-19 01:15:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8622fa7d07e7bdadb0c7acd82e9d9522 SHA-1: e7280c9fadfcb84e935e9a4f52b2595dc247a86e SHA-256: b22b3691c016c594abde0fb08e7f4fc9d26bca69886a8b7867ad4a52f898d9e6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for a "free Robux generator" and a "CLICK HERE TO ACCESS ROBUX GENERATOR" call to action. It links to multiple URLs, with the primary one being http://netcdn.tw/app/431946152/how-to-get-free-robux-hack-game-hack, which is flagged as a malicious redirector. The ML classifier also identified the PDF as malicious. No scripts were extracted, but the document's content and linked URLs indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9452

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/431946152/how-to-get-free-robux-hack-game-hack PDF link annotation
    • http://nicoletastancu.ro/images/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-robux-easy_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_off000026f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26F3 22644 bytes
SHA-256: 23369b35e1dba25984b3206e1147687b3e8bd6d3fba8035f82d0b1bbf83a15d8
font_01_sfnt_off0000599a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599A 18868 bytes
SHA-256: f1cdf876f91d9e30da1238ee6bc5322a54fb60d0a8e12f5fc7ae71cdf41b6736

Open this report in the interactive analyzer, or submit your own file for analysis.