PDF malware analysis — malicious · 8d27b556d4137d45

MALICIOUS

PDF

17.1 KB Created: 2010-03-16 20:18:45 Authoring application: iOqbFJVzr (via xjNr3BXuM)

MD5: d01d918231eeb72c626ec78458922e12 SHA-1: 06bcc0522c4ddd20547e989620d9a1eef780623d SHA-256: 8d27b556d4137d45c618dfe66efc0ffee4562e7dbded495827dd824baaa6ca3a

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 JavaScript stream is heavily obfuscated, utilizing String.fromCharCode and an eval() call, which are common techniques to hide malicious code. The primary intent appears to be downloading and executing a second-stage payload, as suggested by the heuristic 'Suspicious extracted artifact — Signals: Script obfuscation indicators; files: javascript_obj0007_000.js'. No document body text was available for analysis, and the script itself was too obfuscated to determine the exact payload or destination.

Heuristics 5

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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `1c1a9b547cc00be0d6cfa629b04e78a9a5b1b99d9071819b5aa8ec7c7fad23e9`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23A	16301 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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