Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d3fe00d7c28a78…

MALICIOUS

PDF

216.5 KB
MD5: bc2cc341dd70923f79e67d7ac4026696 SHA-1: b3658fdece0398833af88001b460acbb1c1c1147 SHA-256: a0d3fe00d7c28a78d3aad30785f1d511e20046ac50175b1ec3b6f8e35322a0f7
286 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and a RichMedia (Flash) object, both of which are flagged as high-risk. The embedded JavaScript utilizes an eval() call, indicating obfuscation and likely malicious intent. Furthermore, a secondary embedded PDF was detected with similar suspicious findings. These elements strongly suggest the PDF is designed to exploit vulnerabilities and execute arbitrary code, likely leading to the download and execution of further malicious content.

Heuristics 9

  • Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
  • ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
zVGWPnPsl.swf
ae13437efad4e3a4f03cb0339d03b7d795966b217d30a540767c4ae26f402285
pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x146D 26774 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35955
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
javascript_obj0006_000.js
15689f302e582c730e2957af9f693527bed5d4b0c0400330afa9ba85ee307ff3
pdf-javascript-stream PDF /JS object 6 at offset 0x13C 12114 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
polyglot_child_pdf_off0002cfda.pdf
1a6680d1fc92463ff3785c6d92ec8a5a6b1798722e1986bd89fadc1455661f33
polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x2CFDA 37419 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35955
Obfuscation or payload: unlikely