PDF malware analysis — malicious · d1888e03439efd6d

MALICIOUS

PDF

49.0 KB

MD5: 48063b49a29a6e548c35386e35ce6dd1 SHA-1: 52ccc550d3352f1d4fb49bd10b65e6a571b432be SHA-256: d1888e03439efd6d9b2bfc545b2785e295e70ce20f5b5df5f670d280b8d4e993

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_FROMCHARCODE. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature. The embedded JavaScript, particularly the eval() call and String.fromCharCode usage, suggests an attempt to execute arbitrary code, likely to download and run a secondary payload. The differential parser failure also points to deliberate obfuscation.

Heuristics 7

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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.
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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `944694634aa551791a716aa5e36e77173ee4366f974112774554db465a06c2c5`	pdf-javascript-stream	PDF /JS object 5 at offset 0x168	49520 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0005_001.js` `86f5cb228e701a760be15492f8723b3f825d197bc6f003b164fa838db42fa2b8`	pdf-javascript-stream	PDF /JS object 5 at offset 0x168	63 bytes

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