PDF malware analysis — malicious · eeaffd653cd638fe

MALICIOUS

PDF

16.0 KB Created: 2009-10-02 19:49:39 Authoring application: PDF Library 2.4.8 (via PDF Library 5.3.4)

MD5: 678add477408b7978312e126bb97ffc4 SHA-1: 98522639f2a96ad6b29079f09f5bf484e376f8fe SHA-256: eeaffd653cd638fe8f7fe8a6f0bd12fe438e43e17006469d91074bbff83f19ee

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes eval() and String.fromCharCode(), indicating obfuscation. The ClamAV heuristic identifies it as Pdf.Dropper.Agent-7321589-0, suggesting it acts as a dropper for other malware. The JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware.

Heuristics 8

ClamAV: Pdf.Dropper.Agent-7321589-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7321589-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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)
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `69b8980fbb0c3c97f829ce855fce9ecf56b6b3a977f2ec628b2c1062eca479b9`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	173412 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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