Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f9f638e242a4b9…

MALICIOUS

PDF

39.7 KB Created: 2021-05-12 21:32:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 77a5e28bfec39963605726d2ce90761e SHA-1: 31ba07160572ecd4f272d09acd6ef8b11805d6e7 SHA-256: f0f9f638e242a4b918fe80d3eaef429e6c7dea4b1a40c47b2c48a224dfddf27f
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to hacking Roblox accounts and includes a link to a known malicious redirector. The document body and embedded artifacts suggest an attempt to trick the user into visiting a malicious URL, likely to download further malware or engage in phishing. No scripts were extracted, but the presence of a malicious redirector and a download lure strongly indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 3

  • 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.
  • 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/how-to-hack-someone 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_off00003658.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3658 27796 bytes
SHA-256: 7a5dfc60524e2e2a4d1986c61e7caff614bbb5d25577a04265add4c61f642373
font_01_sfnt_off000076c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C9 19316 bytes
SHA-256: 0830f2bc2b032c7ad37be74462a8461862374830fa053aba1852b18e492c5f08

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