Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e52dbf79c495210…

MALICIOUS

PDF

338.5 KB Created: 10/2/2012 12:26:21 Authoring application: PScript5.dll Version 5.2.2 (via GNU Ghostscript 7.05)
MD5: 48e57c201b69fbec51ed2a41aaa3d730 SHA-1: 11ed8ec207ae0e964741e43cc530342b6f42c138 SHA-256: 9e52dbf79c495210efb151c7ec442be313e5ff89e9d040072c8e5148c6206204
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The file was identified as malicious by ClamAV, specifically detecting the EICAR test signature. This signature is a standard way to test antivirus software. The PDF structure also shows embedded files, one of which is the EICAR test file itself.

Heuristics 3

  • ClamAV: Eicar-Test-Signature critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Eicar-Test-Signature
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
eicar.com
275a021bbfb6489e54d471899f7db9d1663fc695ec2fe2a2c4538aabf651fd0f
pdf-embedded-file PDF EmbeddedFile object 273 at offset 0x5335E 68 bytes
Detection
ClamAV: Eicar-Test-Signature
Obfuscation or payload: unlikely
stream_122_off000153d7.bin
3433ab15485d110c370027a3e74f7db6db0e929cfc48afd69f213efb8a6e4796
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x153D7 42008 bytes
font_00_sfnt_off0001ae28.bin
5e9d665e3795304048433da9d7675e8b8fa2194cf08f86027b85f71c05877aad
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE28 28716 bytes
font_01_cff_off00028ac6.bin
57ef845c7c1f09dd02b3073e4d8fc2f08677bf53beb711218b4bd2bd59ab35c6
pdf-font-stream PDF embedded font (cff) at offset 0x28AC6 623 bytes