PDF malware analysis — malicious · 4d420da13959fb09

MALICIOUS

PDF

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

MD5: 6791f38ffe429f72d13fce2aa9eeae0a SHA-1: 21e0bcac118190b1f4dab2aa9d09a4259c0ef875 SHA-256: 4d420da13959fb094b734c2c5cd2c881245d5fe7d9e2ef5fc3f13787e58c7a26

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

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 malicious intent, likely to exploit a PDF viewer vulnerability. The embedded artifact 'stream_001_off000008ed.bin' is a suspicious extracted blob, common in exploit delivery.

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` `4ee2be9f548dc98b0b776c5835dffc15bcd031e301d0069ce25c36c6d2755125`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1432 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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