PDF malware analysis — malicious · abafcd391e0b7418

MALICIOUS

PDF

4.0 KB

MD5: c6e61d71bd7b80980fa899a372f9f757 SHA-1: d28de9317a323427409ada7cf9bf7b5499505d2c SHA-256: abafcd391e0b741838c1dc64c0d6b5df72e40ae8eee76806a036beb63b1e33d4

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 PDF_EVAL and PDF_FROMCHARCODE firings, along with the presence of obfuscated JavaScript streams (acroform_b64_00.js and javascript_obj0013_001.js), suggest that the script is intended to execute arbitrary code. This code likely downloads and executes a second-stage payload, a common technique for malware delivery. The exact nature of the payload cannot be determined due to the obfuscation.

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. (matched inside decoded stream)
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_obj0013_001.js` `777e09bf50baabb838afc7c43a9beb238b0b4ae0958b8640e8e29f2649cad8aa`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6361 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `83695e510a36295340cfd7c761b6d0fc36b19c295973ba3e760ff8974c5f03a8`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3616 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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