PDF malware analysis — malicious · 362a5e6d7ef433e6

MALICIOUS

PDF

556.1 KB

MD5: 35432ed56c11d22096a3edb5894cfce0 SHA-1: aee7d36ed5d741c37e3c5f70941fc36403a7a1a6 SHA-256: 362a5e6d7ef433e614d7a14a4ee5a2b7752294c0f73327e7434e356a79873d2d

130 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded script payload, indicating it's designed to exploit vulnerabilities and deliver a secondary malicious component. The presence of an embedded file further supports this.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 6

ClamAV: Win.Trojan.Quarian-4254605-2 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Quarian-4254605-2
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.
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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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_obj0001.bin` `a728eba3959260fd910b00caf2265179d2dba12f1853c951d37f2512c1b20178`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x26F	25241 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).

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