PDF malware analysis — malicious · cf6548f5c05d3dd7

MALICIOUS

PDF

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

MD5: 57735c688c569c3f4093cb88b8007d8f SHA-1: e6afc243176b4358b815d9afb0596a542af4b527 SHA-256: cf6548f5c05d3dd7baff3c7721f39ffb2dd7f66a22e5420f16451ee8e9b073f9

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV with the signature Pdf.Exploit.Agent-36874. Static analysis revealed the presence of an XFA form and an AcroForm button with an action trigger, indicating potential exploitability. A suspicious, long encoded blob was also extracted, suggesting the presence of a malicious 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` `23e0279eeefc93c8d3284c8d2e0facb8691629f856d030cc0bdb9abc532960a6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1389 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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