PDF malware analysis — malicious · e7b036e7bd4be7b0

MALICIOUS

PDF

70.9 KB Created: 2010-02-22 08:19:16 +08:00

MD5: 045e858a89a875e5a336a7a3340c9b84 SHA-1: 0567ad5831082e3fc6263b02d0178b1447e51462 SHA-256: e7b036e7bd4be7b0fe8649615f428b3895e112f59ba7dddd0930c7184386e6d5

226 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains multiple JavaScript streams and an embedded file, indicating malicious intent. High-confidence heuristics like 'PDF_EVAL' and 'CLAMAV_DETECTION' with the signature 'Pdf.Exploit.Agent-35955' strongly suggest exploitation. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as indicated by the presence of multiple JS streams and an embedded binary file.

Heuristics 9

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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0005.bin` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x1518	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_obj0012_000.js` `a8e9a031915fc297bf10a6ec84576b5b55a9de0263ee4db0e5604573a17731a2`	pdf-javascript-stream	PDF /JS object 12 at offset 0x3CD	9494 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `70c940ca448d03dc56836c5dd011e2433261e89c9ce18ff31ddad7a53b4ae68c`	pdf-javascript-stream	PDF /JS object 28 at offset 0x8CC3	18151 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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