PDF / .SWA malware analysis — malicious · 1abc668ef71a07e0

MALICIOUS

PDF / .SWA

10.0 KB Created: 2010-07-24 16:00:28 +04:00 Authoring application: hCyD (via 4123de1)

MD5: 2495c50144588c6f2c95c801d6e34fa4 SHA-1: 4a3cf99e1aaf501bb81aa5a279313bd95e106ca8 SHA-256: 1abc668ef71a07e05591e08119b6e8719a16ae815d1b2088f00473c3a8a3acd5

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript streams, with high-confidence heuristics indicating the use of eval() and String.fromCharCode. These techniques are commonly used to obfuscate malicious code. The extracted JavaScript artifacts, javascript_obj0011_000.js and javascript_obj0013_001.js, likely contain code designed to download and execute a second-stage payload, contributing to the overall malicious nature of the document.

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.
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. (matched inside decoded stream)
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
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_obj0011_000.js` `8a8196a7690afe13d3a8a50597c7edf88ecf90ab7db7252b045b786fdb1c3ca4`	pdf-javascript-stream	PDF /JS object 11 at offset 0x2124	461 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0013_001.js` `7d0f1633fa3bf931bce9b0dafa48bb2df49c3da1ed550edc7eed0d0f85aaf672`	pdf-javascript-stream	PDF /JS object 13 at offset 0x2281	250 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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