PDF malware analysis — malicious · 4e10ac03f73c782d

MALICIOUS

PDF

46.4 KB Authoring application: 52,164,161,159,117,154,147,164,117,161,150,151,90,145,123,105,144,145,123,106,91,109,175,164,151,166,167,164,160,82,145,123,103,175,152,167,160,149,166,155,161,160,82,145,123,107,90,145,123,104,91,173 (via 1,154,119,162,107,152,161,116,125,97,97,97,97,97,169,115,115,115,115,116,115,115,115,115,115,115,115,115,115,115,115,115,131,115,115,115,115,115,115,115,115,139,170,117,115,133,155,115,153,139,115,97,)

MD5: 3701c88979bd8e6f1409dabdd4b092cf SHA-1: f72f1fd6b9e97095cb85956d921b2c6c17705f4a SHA-256: 4e10ac03f73c782dfd42bf6a942cf6e550431c13a598848e388f94e0154b594e

224 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV (Pdf.Exploit.Agent-36962) and a machine learning classifier. High-severity heuristics indicate the presence of XFA forms with executable scripts and eval() calls, suggesting an attempt to exploit PDF vulnerabilities. An embedded script payload was also detected, likely intended to download and execute additional malicious content, as indicated by the 'embedded_file_obj0043.bin' artifact.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 10

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.
ClamAV: Pdf.Exploit.Agent-36962 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36962
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
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
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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.
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.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0041.bin` `c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb`	pdf-embedded-file	PDF EmbeddedFile object 41 at offset 0x94A2	85 bytes
`embedded_file_obj0042.bin` `b40a217a8d9b8d3671cc3874c550d30941b93ca6dde99995d43921dede579865`	pdf-embedded-file	PDF EmbeddedFile object 42 at offset 0x9554	1183 bytes
`embedded_file_obj0043.bin` `0172d45f3d1035ca3ba6e3fe5fad98320fb0ad948dffb51ff0f39033d17ec2f6`	pdf-embedded-file	PDF EmbeddedFile object 43 at offset 0x97A6	2826 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`embedded_file_obj0044.bin` `3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169`	pdf-embedded-file	PDF EmbeddedFile object 44 at offset 0x9D24	144 bytes
`embedded_file_obj0045.bin` `ce4a3f07835c725838e55947d6b1f21771e0ad8084ee86d0890ecc12bd5231fd`	pdf-embedded-file	PDF EmbeddedFile object 45 at offset 0x9DE6	2427 bytes
`font_00_cff_off00003569.bin` `23831e143e2e1a484b95ee765b15d94562c951468b895c080e655667dc04ddf0`	pdf-font-stream	PDF embedded font (cff) at offset 0x3569	31178 bytes
`font_01_cff_off0000a1b6.bin` `062eede2d0cc5d3972869dc7e2f2f9f01d1d1b3756b715c8252f06948ce99ae2`	pdf-font-stream	PDF embedded font (cff) at offset 0xA1B6	1192 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.