PDF malware analysis — malicious · 23c7f35e013ebd2c

MALICIOUS

PDF

14.7 KB Created: 2009-06-06 12:30:26 +03:00 Authoring application: NitroPDF 6.0 (via BCL easyPDF 6.00.20)

MD5: 696cd70e8a3fe5c8a8d262ea7f05e1c0 SHA-1: 2474f392afa49fce77c4724b1b85c39200e0f323 SHA-256: 23c7f35e013ebd2cce890548bdf32057035fc146d8fc5de0268905e04f0f5efe

120 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript with eval() calls, indicating an attempt to execute malicious code. The ClamAV detection 'Pdf.Dropper.Agent-1828684' strongly suggests a dropper functionality. The JavaScript is obfuscated, making its exact actions difficult to determine, but it is highly probable that it downloads and executes a second-stage payload. The presence of JavaScript actions and embedded JS streams, along with the eval() call, supports this assessment.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-1828684 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828684
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.
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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_obj0015_000.js` `849b20da2fed724e325962a18b39f13314f506d6f2b4af52789152a62f7393e1`	pdf-javascript-stream	PDF /JS object 15 at offset 0x315	28403 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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