PDF malware analysis — malicious · 05e877c8428447cb

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6

MD5: 0d64029f5224b86d5c1064c0f9d0e6a5 SHA-1: 5d1659c1252515474850260cf4c3fe4b0bbdf4d9 SHA-256: 05e877c8428447cbc6854fe33ec704b0ac26fa57c912f481dfe17c6cfa467e9b

110 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as Pdf.Exploit.Agent-36874. It contains an XFA form and an AcroForm button with an action trigger, indicating a likely exploit targeting PDF vulnerabilities for client execution. The presence of a suspicious embedded stream further supports this. While no specific URLs or scripts were extracted, the nature of the exploit suggests it's designed to download and execute a secondary payload, commonly delivered via spearphishing attachments.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36874 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36874
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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.xfa.org/schema/xfa-data/1.0/
- http://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off000008ed.bin` `1fcbf94463e16f52b74065180cc6ae4271bf725059d62b02a6fd2e3b2660cd55`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1469 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.