Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0022bd66cf5afcc…

MALICIOUS

PDF

10.4 KB
MD5: ac28094b5b2f4a595a06731bb70c3336 SHA-1: 2cbe4af0641db1696808099cf768915995273409 SHA-256: b0022bd66cf5afcc2ed7551282b0139c23e73833cc0276603edcdb81478d5cf2
78 Risk Score

Malware Insights

MITRE ATT&CK
T1557 Adversary-Controlled Chain of Trust

The PDF file was flagged by ClamAV with 'Heuristics.PDF.ObfuscatedNameObject', indicating a suspicious structure. Furthermore, a low-severity heuristic identified an embedded file within the PDF. This embedded file, named 'embedded_file_obj0001.bin', is the primary indicator of malicious intent, suggesting it's a secondary payload or exploit. The XFA form heuristic also suggests a complex document structure often used for obfuscation.

Heuristics 4

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
7dae9217483ace997b70dc2f164ffc19508770668d52c0513aca53e5bdc0860a
pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x7C 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).