PDF malware analysis — malicious · bf10b6dcc26a3108

MALICIOUS

PDF

9.2 KB Created: 2009-07-16 17:14:55 Authoring application: mdJxfennobeozIRdEScKK (via wDhRLxYIQTrwqMp)

MD5: 4123c23d3f42a7e26d618fc6dd7a938b SHA-1: d1dc541571abf57e56289841428ca86441c32e91 SHA-256: bf10b6dcc26a310819e6495a687cde112b4937ca94c817a7eaff374c06a6219f

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ClamAV detection 'Pdf.Exploit.Agent-35572' strongly suggests a known exploit. The embedded JavaScript, though obfuscated, likely facilitates the execution of malicious code, consistent with a PDF exploit attempting to download and run a second-stage payload. The document body content is nonsensical and appears to be filler text, further supporting a malicious intent behind the document's structure.

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_obj0007_000.js` `92c9572ec4e13097803d4ec21ff0b24eda510888369d05ee656cf285b2db8cf9`	pdf-javascript-stream	PDF /JS object 7 at offset 0x502	7311 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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