PDF malware analysis — malicious · 4e682508aab82af8

MALICIOUS

PDF

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

MD5: 5bd308e6df07361dee13ef2ebafed83c SHA-1: 3a11e62593bee0863a4fd0235d216f3454de4cd8 SHA-256: 4e682508aab82af8d595f3a0c23c6f6c133ec0400a014d12a19165d80967092e

78 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The file is a PDF document identified by ClamAV as Pdf.Exploit.Agent-36874, indicating a known exploit. The presence of an XFA form and an AcroForm button with an action trigger further suggests a malicious intent to exploit PDF vulnerabilities. The extracted document body contains obfuscated text, likely part of the exploit or lure, but does not provide clear user-facing content. No scripts were extracted from this sample.

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` `f5454b7c4cf561c08d9a232885da281f21fb1913bd69b9930c9cab81044c2405`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1483 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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