Malicious PDF — malware analysis report

Static analysis result for SHA-256 557c2a6bed148e46…

MALICIOUS

PDF

58.7 KB
MD5: 84a4a8fdd7ad5fa34556b28a40aad85b SHA-1: 8deb8a8f4ec90bf4bbbcfa4bd3c6d728c7f76a50 SHA-256: 557c2a6bed148e468b438133a8fbb108f94f722170b236d7c172dfc5a0ee0066
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a RichMedia (Flash) object, identified as CVE-2010-1297.swf. ClamAV detections indicate this is a known exploit, specifically 'Pdf.Exploit.Agent-35955'. The embedded JavaScript is likely responsible for triggering the exploit, leading to the execution of the malicious Flash content. The presence of both JavaScript and a Flash exploit points to a multi-stage attack aimed at compromising the user's system.

Heuristics 7

  • 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
  • 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
AdobeSystem
2c7ca4fbed7155ab780d5d0a2c60615cac253028b3c562f3641b8afa4a27e3ad
pdf-embedded-file PDF EmbeddedFile object 5 at offset 0x1B0 21285 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.
CVE-2010-1297.swf
e00f8888a663b7605e1a74a39b06c4c4210174facea50eafd361d375f73abd1a
pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x7C7B 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_obj0008_000.js
cb7f70e8fc08ffb77a9811096381fc462ea2477bb7cd6ac9d34ddec6a8c7a835
pdf-javascript-stream PDF /JS object 8 at offset 0x555F 4096 bytes