Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9523019a761a32…

MALICIOUS

PDF

37.0 KB Created: 2021-05-12 04:00:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e16291114761fba7722a9f8d6758c242 SHA-1: c06055476760efe4abe04b4bf459a5c3f5e8bcd6 SHA-256: 5f9523019a761a323563a8c190844351a3b84062c1da3dbd176c8c1cb1884e2e
132 Risk Score

Malware Insights

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

The PDF contains a lure for a "free Robux hack" and impersonates the UPS brand, directing users to a suspicious URL. The document body and heuristics indicate a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit user interest in game hacks to lead them to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-get-free-robux-hack-2021-game-hack.
  • 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/how-to-get-free-robux-hack-2021-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000034de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34DE 25024 bytes
SHA-256: 077671ab1b15524d6cabf7c914987cae3982a92851d5c7ee093eba9bc989179f
font_01_sfnt_off00006ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE2 19084 bytes
SHA-256: bf126c80224e4ece1a877f3c45a4e2f725662c205f8b78a709aa4c80730d283c

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