PDF malware analysis — malicious · 434baa72798e2349

MALICIOUS

PDF

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

MD5: 6a4394a9224cb53c7604cdfaa02951d5 SHA-1: 833cd02f2b13b627e0f4416f88154f638785790d SHA-256: 434baa72798e234994a7059a97cb6b0b2eaef592f432cf2990267ff8a0a0848a

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The critical ClamAV heuristic firing indicates this PDF is recognized as Pdf.Exploit.Agent-36874, a known exploit. The presence of an XFA form and an AcroForm button with an action trigger further suggests malicious intent, likely to exploit a PDF viewer vulnerability. The embedded artifact, a decompressed PDF stream, likely contains the exploit code.

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` `bf407c49cae495b71ff71d3d8dbf109b9dce67d22b977c07c678dc8358b52b09`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1400 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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