PDF malware analysis — malicious · 4cce7bce43875dbd

MALICIOUS

PDF

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

MD5: 004d4cfd167006f982545e7e15eb5a2e SHA-1: 3f736e489632b947cf684e824e244c5fa4685e42 SHA-256: 4cce7bce43875dbd4b76adf7ffd23ef8c328985018777528f1405aeb195ae705

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The critical ClamAV detection and ML classifier firing strongly indicate a malicious PDF exploiting a known vulnerability. The presence of XFA forms and AcroForm buttons are common vectors for such exploits. The decompressed stream artifact suggests the presence of embedded malicious content designed to be executed.

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` `5502e4a06645ee244ebd61fd33362924797a6e92fe7117aaee9e2453d8f23b11`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1375 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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