PDF malware analysis — malicious · 2da3e94da9c2ced1

MALICIOUS

PDF

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

MD5: 12e4f2ae98e3b37c553d851818d06a8d SHA-1: 5be9cb44903e30e3728b88acfbf17dc49ece70d4 SHA-256: 2da3e94da9c2ced1dc27855e1e3129469bae45443614388d75a8da5b114411af

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identifying it as Pdf.Exploit.Agent-36874. The presence of XFA forms and an AcroForm button with an action trigger suggests an attempt to exploit a PDF vulnerability. No scripts were extracted, but the overall structure and heuristic firings indicate a malicious PDF designed to deliver a payload.

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` `e710795b8e5c84c1b4db1fbf51b3d0ceb66a9911bcc3be069c39955d1b86a555`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1449 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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