PDF malware analysis — malicious · 7a2003b50c61eda0

MALICIOUS

PDF

39.5 KB

MD5: 2926cf483d54db1fd04d354d700b1e47 SHA-1: 990e4193aa66436fb08c760dca24d82e20d5d02c SHA-256: 7a2003b50c61eda0b4f89dce54b557e643e58ddb53bc3c5e0129a1cda424ce1f

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, indicated by multiple PDF-specific heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The embedded JavaScript streams, particularly 'javascript_obj0005_000.js', are likely responsible for downloading and executing a secondary payload. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature of the file. The exact URL or execution method of the second stage could not be fully reconstructed due to 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` `b4aea003549e5d756a86f8c7b5454efbabde1c2f2ca9af2596720bc125e9f69c`	pdf-javascript-stream	PDF /JS object 5 at offset 0x16A	39852 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0005_001.js` `8da877518e9607c6176c13d44c38102294643e2a38f1ac399cd41660a31f3fa1`	pdf-javascript-stream	PDF /JS object 5 at offset 0x16A	51 bytes

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