PDF malware analysis — malicious · e2784154ad685929

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: c771e8aeddc39cada1a075855e4328f6 SHA-1: b92eab5e9f53e273fa73410352171581052b1e2b SHA-256: e2784154ad6859296a4e95ea920791b76304cf9bc7ab68553168490aa4433403

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF document identified as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis detected embedded JavaScript, which is often used to download and execute further malicious content. The presence of JavaScript actions and embedded JS streams strongly suggests an attempt to deliver a secondary payload, likely a trojan or downloader.

Heuristics 5

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
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.
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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `69ba1740fd11881d223cc71c84cdc239c50d5e1eec35d4a3ed81a52093d5d4ea`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75125 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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