PDF malware analysis — malicious · 23f3c44d56bb4a44

MALICIOUS

PDF

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

MD5: 4d22611fcd6e035b2f544f8a347afe56 SHA-1: ddfe15ae7da5843e6944872d67e661d05f3f0990 SHA-256: 23f3c44d56bb4a44aefba27db872965d5b22c1403d598193d31aace388549f6d

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36874, indicating a known PDF exploit. The presence of XFA forms and AcroForm buttons with action triggers further suggests malicious intent. While no document body text or scripts were directly interpretable for specific lures, the critical ClamAV detection and structural PDF elements strongly point to a PDF exploit designed to deliver a secondary 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` `120db7ad6c1f774cc3c4a584a66c97e66bc4283eaaadb44cd8b5a3161636bfbb`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1441 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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