Malicious PDF — malware analysis report

Static analysis result for SHA-256 510a5e1e611ab00c…

MALICIOUS

PDF

40.5 KB
MD5: fcd00ac875bbf2fc0bbdf04dd8b6619f SHA-1: 3d23b524738e44d304f304c862c8e70a4318d6b9 SHA-256: 510a5e1e611ab00cdf9db46b36fa6d33a32a05cdc49b3dc54b779e238fccf7a2
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link or Macro: Malicious Link T1204.002 Malicious Link or Macro: Malicious Macro

The PDF file contains embedded JavaScript and is flagged for exploiting CVE-2007-5659, indicating it's designed to execute malicious code. The presence of U3D content and multiple deobfuscated JavaScript files suggests a multi-stage exploit. ClamAV detection as 'Pdf.Exploit.Agent-36062' further confirms its malicious nature. The primary attack vector appears to be leveraging a known Adobe Reader vulnerability to run arbitrary code.

Heuristics 6

  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
  • U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED
    PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
  • ClamAV: Pdf.Exploit.Agent-36062 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
  • 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.
  • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3
pdf-javascript-stream PDF /JS object 7 at offset 0x1A2 373 bytes
legacy_pdfkit_stage_000.js
e77e7b6b43adc58fc2325f531c1f242d1eae4b779837037f111a62d5bfdd184a
deobfuscated-js repeated-marker hex decoded JavaScript at offset 0x2FC 13194 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
legacy_pdfkit_stage_001.js
c16c5682dfb305e2021b40ebc7b784720b626644a83bd75b8a09091087cfb859
deobfuscated-js repeated-marker hex decoded JavaScript at offset 0x2FC 5541 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 5 eval/decoder/string-building token(s).
u3d_00_off0000359a.bin
48816569ab4f370009a917ef6429edbe09e4dfe8a63b00a0a0f75a904c62ba94
pdf-3d-stream PDF U3D 3D stream at offset 0x359A 27449 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.