PDF malware analysis — malicious · 5814bba072bf026b

MALICIOUS

PDF

18.3 KB

MD5: 7d0b6648df0379aef96ceaa753b0bbe9 SHA-1: 34a35c632493a128cefe41bc313dfe4b0d22ddc5 SHA-256: 5814bba072bf026b44904dd3371bf54007052c25f8fc715ac7752bf5204f2301

148 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file utilizes XFA forms and contains an embedded script payload, as indicated by multiple critical heuristic firings. ClamAV detections 'Pdf.Exploit.Dropped-78' and 'Pdf.Exploit.Agent-36809' on the main file and an extracted artifact respectively, strongly suggest malicious intent. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality cannot be determined due to its obfuscated nature. The presence of an embedded URL further supports the delivery mechanism.

Heuristics 5

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000329.bin` `0a5ad40160e51c776321fc220f3581dc2fda2b7c87f2d88b4fd9f748ef2b34fb`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	18001 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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