PDF malware analysis — malicious · e5157146e454145f

MALICIOUS

PDF

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

MD5: c40ccec60f33a0396d35f34e14a08c41 SHA-1: b1fe81fd0d9e6762293357c762c90a396edd2d1c SHA-256: e5157146e454145f4d1df390dd5ff97f8e63542a0d29e71bb67e9dbdd28c0510

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The critical ClamAV detection and ML classifier strongly indicate this PDF is malicious. The presence of XFA forms and AcroForm buttons suggests an attempt to exploit PDF vulnerabilities. The embedded artifact, a decompressed PDF stream, likely contains the exploit code. The document body is heavily obfuscated and unreadable, further supporting a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 4

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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off000008ed.bin` `7de52cba39d91a5f58a7b5a0d4225f8432779482c9ccf715d76fbc66c64d01cd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1450 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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