PDF malware analysis — malicious · 7f64b58e97ce4e57

MALICIOUS

PDF

104.7 KB

MD5: 0adb7066efbcacd8140786db5db01d09 SHA-1: 1a65ab7de0717f2612fec6b4f5d09b3bc5a8d946 SHA-256: 7f64b58e97ce4e57da1a412503f252a487ae4e545499bd9095c37d2736d3e185

168 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1027 Obfuscated Files or Information T1059.007 JavaScript/VBScript

The PDF contains multiple high-severity heuristic firings indicating embedded script payloads and XFA form exploitation. The ML classifier strongly flags this PDF as malicious. An embedded file artifact was also extracted, suggesting a multi-stage attack. The specific script content was not detailed, but the presence of XFA and embedded scripts points to a common PDF exploitation vector.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `5f899e90d12c0cb7932683c0204454b3ae4dc2158c368217745c7427eb947520`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15202 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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