PDF malware analysis — malicious · 788bf3722bb9878a

MALICIOUS

PDF

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

MD5: 806881de36c4c3ea848191dd01e130bc SHA-1: c5f3178c4712ec75e0353d28f3dc7f816899e4b8 SHA-256: 788bf3722bb9878a7845f2260efc53fa4f119dc902edd2d861243502fe812d7e

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF document was identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36874. Static analysis revealed the presence of XFA forms and AcroForm buttons with action triggers, indicating a potential for exploit execution. An embedded, decompressed PDF stream was also found, suggesting the document is designed to download and execute a second-stage payload.

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` `260269402686b60b2892e30d71cc36e308cd195508539b7ce25aa80acd526433`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1404 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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