PDF malware analysis — malicious · 50b0c298b3e36a9d

MALICIOUS

PDF

8.1 KB

MD5: fedfc5002ce56bfa85aaecaeb203a79c SHA-1: e7f98d6c3b2800b9df43a6f1b8685a2f25b3b924 SHA-256: 50b0c298b3e36a9d6d0307d3f72b8472e286540f6431c526212383387ccc9ee8

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests that the JavaScript is being used to execute arbitrary code, likely to download and run a second-stage payload. The PDF_FROMCHARCODE heuristic further points to obfuscation techniques commonly used in malicious scripts. No specific family could be identified, and no external URLs were found to be malicious.

Heuristics 6

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
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)
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://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off00000328.bin` `a444650cd329bba97768be3dcc7006a88f9db48bb819aac6c5d339eeebbfa592`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x328	3006 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`objstm_0024_00.bin` `b9a4f94994591fe6023ea78e487d378767ea4322565a24fe312b9c0d230729a0`	pdf-objstm-decoded	PDF /ObjStm 24 0 obj (inflated)	380 bytes

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