PDF malware analysis — malicious · 81ce26c95f445f2a

MALICIOUS

PDF

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

MD5: 4aaabc6397553920e84894005adb1ae1 SHA-1: 44d3f6d29c61baad3c428bc0e674a9ffbd73e790 SHA-256: 81ce26c95f445f2aa2bb40760daccfa3243337303051673e1ae246eeccd87856

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, suggesting it contains an exploit. The presence of XFA forms and AcroForm buttons further supports the likelihood of exploit code being embedded within the PDF structure. The extracted artifact 'stream_001_off000008ed.bin' likely contains the 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` `4bac546150c4821441f7de41c52bbfc0220224904f1a98f7937fd22b098396b8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1407 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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