PDF malware analysis — malicious · d60a5186c0d9eec0

MALICIOUS

PDF

105.6 KB

MD5: 584594b3f1e540173f59111be6d2f19a SHA-1: 3c6b89140a16a1513499ec278184523d60bd19ed SHA-256: d60a5186c0d9eec0c003e7bbd3e92488ff2a511c11d878f304cf92138caa2075

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF sample contains multiple indicators of malicious activity, including embedded files and the use of unescape functions and ASCIIHexDecode filters, suggesting an attempt to conceal malicious content. The presence of XFA forms with executable scripts further points to exploitation. The primary malicious artifact identified is an embedded file named 'embedded_file_obj0008.bin', likely a second-stage payload.

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` `1004fa435218fce0662d78d0d47b5ba38b350052d526a5fc78542ef8b92a3111`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15346 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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