PDF malware analysis — malicious · 9420c4873592b022

MALICIOUS

PDF

11.2 KB Created: 2010-12-26 18:41:07 +03:00 Authoring application: D_anMo (via 544defa)

MD5: 6a19e6df36d40a0e455406473301b769 SHA-1: 196f589c57bce82b5e4d9cecf97d0757c575038d SHA-256: 9420c4873592b02278ede1f55af5b85616f744486efc85f23c3b19055f040aa2

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains multiple embedded JavaScript streams, with several triggering heuristics related to JavaScript execution and obfuscation. One heuristic specifically points to an eval() call, indicating dynamic code execution. The presence of these JavaScript objects suggests the document's primary function is to leverage these scripts, likely for downloading and executing a secondary payload. The document body is unreadable, so the rationale is based solely on the script-related heuristics.

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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0011_000.js` `338ce9f135aae948b37227a003cad4e77453612910582f169fd68eb445847f97`	pdf-javascript-stream	PDF /JS object 11 at offset 0x2365	1186 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0013_001.js` `b0f7410eb45c7da3a4382499f0edb52ee8fb1f064913fda3f2f60c18ecb79df6`	pdf-javascript-stream	PDF /JS object 13 at offset 0x2607	492 bytes
`javascript_obj0015_002.js` `6ffb0090fbe2df8b2be872d1ac1161ca87b2cc21c53c37702b9483d07e873a8a`	pdf-javascript-stream	PDF /JS object 15 at offset 0x279F	124 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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