PDF malware analysis — malicious · 93c53e1a9d9307da

MALICIOUS

PDF

105.5 KB

MD5: 7de8f5cd14f23210c6a7098eb5bf48b9 SHA-1: 183577060ebc4e781b94ab0fb34aac6affeeab70 SHA-256: 93c53e1a9d9307da08fded35d7d188aa6c28f09529af3ae4ead78b9a7e9589e1

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1027 Obfuscated Files or Information T1566.001 Spearphishing Attachment

The PDF file contains multiple indicators of malicious activity, including embedded files and scripts, and the use of PDF-specific decoding filters like ASCIIHexDecode. The presence of XFA forms with executable scripts suggests an attempt to execute arbitrary code. The primary attack vector appears to be exploiting PDF vulnerabilities to deliver a secondary payload, indicated by the embedded script.

Heuristics 7

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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
`embedded_file_obj0008.bin` `ea2bbfdbb2f46511159e2127f3e417a7217a77bf260e060713b0edbbef778244`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15322 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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