PDF malware analysis — malicious · 1d5c31c9668ea5f0

MALICIOUS

PDF

15.1 KB Created: 2009-04-29 12:05:39 Authoring application: ugbMezgHanNPZ (via RaQpBjfhTGAIOvjq)

MD5: 4072b088fe4c038d5a7af88dc69bfbd1 SHA-1: 8a8862b2a656f1d4db1159217b421a76528196be SHA-256: 1d5c31c9668ea5f01e4bf6031b038a7fe9c781e7ddea0c1ff38e480d5a27726a

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics, and a critical ClamAV detection for 'Pdf.Exploit.Agent-35572'. The embedded JavaScript, named 'javascript_obj0009_000.js', is likely responsible for exploiting a vulnerability within the PDF viewer. The document body text is nonsensical and appears to be obfuscated or filler content, further suggesting malicious intent. The primary attack vector is the execution of this embedded script, which is designed to download and execute a second-stage payload.

Heuristics 5

ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `e731585519b127a51f6a179f82088277194c54487101a96f905c6d9352b2dde8`	pdf-javascript-stream	PDF /JS object 9 at offset 0x79D	12699 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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