PDF malware analysis — malicious · a852ce4fe017e73b

MALICIOUS

PDF

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

MD5: 5af4e2b26e5a09586f46dcdc890ea786 SHA-1: 2dd6275c0120a48abc4ba1f0a261ed0b0bfc342e SHA-256: a852ce4fe017e73b0edc71faaa39095acef6dfe2a638522eda2860bf5624c245

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

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 execute an embedded exploit. An additional suspicious extracted artifact, a long encoded blob, also points to 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` `85599fc13d3b1e6460b4e28b7fd6032b898fdff448d29b864543b813f6877b3f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1455 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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