PDF malware analysis — malicious · c7dd895b8d27e1e9

MALICIOUS

PDF

15.3 KB Created: 2009-10-01 19:45:78 Authoring application: PDF Library 8.2.6 (via PDF Library 1.7.9)

MD5: cc8a7afda12aea576d7c50711acfa478 SHA-1: d2f1260ece16aae332ace20397de012adecfa200 SHA-256: c7dd895b8d27e1e999e71827b1893b95970d2e7377344e19a11cbda7d2bc497c

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF sample was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript with eval() calls and String.fromCharCode, indicating obfuscation. The JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the 'Pdf.Dropper.Agent' ClamAV signature. No specific malware family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

ClamAV: Pdf.Dropper.Agent-7685832-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7685832-0
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` `db8ebc2b2069569e76087ade4e38bd8eeff11731244cb882d3bc852724d23409`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	149601 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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