PDF malware analysis — malicious · 4af23b35ef6419b0

MALICIOUS

PDF

7.7 KB Created: 2012-04-17 19:53:38

MD5: d306c5109d851f2c671040fcf7b83b97 SHA-1: 431f3775e5a58397a67c6a34a6dcd5a25d48d450 SHA-256: 4af23b35ef6419b0b39d77c3466bdf5426ca8dce5b67335f0d2db6344f9f8f84

128 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing Link

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-156969-1'. Static analysis also revealed an embedded script payload and an embedded file, indicating the PDF is designed to exploit vulnerabilities and deliver a secondary malicious artifact. The ML classifier strongly supports the malicious verdict.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Dropped-156969-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-156969-1
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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
`embedded_file_obj0008.bin` `4a66dbf33995153eb6946e59f0f4f94c96e0cbcbafeb23cd30795e27de954cd2`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xBAF	7163 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 long base64-like blob(s).

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