Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf74289c14d650a…

MALICIOUS

PDF

38.0 KB Created: 2021-04-30 07:39:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6a324aabd54f7e13c7eb3498a13a9374 SHA-1: 0f0daeb7b4597375edc147fdd92a7916662c23f5 SHA-256: ebf74289c14d650a8b03437861e06992a5393c9749d53396dce2932875498eaa
178 Risk Score

Malware Insights

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

The PDF document employs social engineering tactics, including urgency and a visual download button, to trick users into clicking a malicious link. This link redirects to infrastructure known for distributing malware, specifically a Roblox gear hack script. The presence of embedded URLs and the nature of the lure suggest an attempt to deliver a second-stage payload, likely involving JavaScript execution.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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
  • 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/roblox-gear-hack-script-pastebin-game-hack In 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_003_off000038aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x38AA 24832 bytes
SHA-256: 77a14894556491d550ac7bef9dec8ca3b95e646a15b58ba19fe2f15e4d240071
font_01_sfnt_off000071f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F6 18736 bytes
SHA-256: ae4b7c4d401e040d85ed12d530265ca7f91470a59540fd616c4d84a7453916e2

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