Malicious PDF — malware analysis report

Static analysis result for SHA-256 803db40cfe6772d5…

MALICIOUS

PDF

36.2 KB Created: 2021-05-13 22:08:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 65edff200ba3cbee47c287e03caf85a2 SHA-1: ab8e98d0b92cfe2ef122a28dc9c6d2bdf8fe2c3e SHA-256: 803db40cfe6772d54768a08184485cda7681a9f58469cb356ceb36716a8535d3
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links and a visual call-to-action button, strongly suggesting a phishing or scam attempt. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The document body, though partially garbled, contains text related to 'Robux' and 'generator', indicating a lure for in-game currency.

Machine Learning

  • Nyx PDF Classifier clean score 0.0283

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/blox.page-free-robux-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_off00003240.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3240 24404 bytes
SHA-256: 1433f8037eaa2a9b37d7725c698486abeed1f057787be0f5e5e4a7915659bd87
font_01_sfnt_off00006a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A60 18848 bytes
SHA-256: 477bf2ef93abdd264292ffad6df1a1b97b65e35661cdcc3b49278aa82d19b07c

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