PDF malware analysis — malicious · 87a492de04d65433

MALICIOUS

PDF

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

MD5: 42aad2cccc4a8d42cbfb636861286134 SHA-1: a40f90ac86948bbeb46677ba2fc7fa4e9fe2e936 SHA-256: 87a492de04d65433df9b626ad29985a2b34105c11eb11ffc3bff8a5bc92da9dd

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file is a PDF document identified by ClamAV as Pdf.Exploit.Agent-36874, indicating it exploits a known PDF vulnerability. The presence of an XFA form and an AcroForm button with an action trigger further suggests malicious intent. An embedded, decompressed stream artifact was also detected, likely containing the exploit code. The document body contains obfuscated text, typical of exploit-laden PDFs.

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` `ebe844018dfe255a7654ee94d2030a092d2982555fa567324017956d092783fb`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1427 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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