PDF malware analysis — malicious · b54aeda6448ece9e

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6

MD5: 1e6d5b309a28ea2cd99736af04bec38b SHA-1: 1c947e840497b12c7df939e5beaa34445b435d89 SHA-256: b54aeda6448ece9ed45ab787a222b00f7cbb34a893516bd801610959fbe2abb3

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically detecting an exploit. The presence of an XFA form and an AcroForm button with an action trigger suggests an attempt to execute embedded code. The file likely exploits a PDF vulnerability to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36874 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36874
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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
`stream_001_off000008ed.bin` `05e30f71231213545630596b83c851bfc1882c19405730ac3bfc993f61a1f1a0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1497 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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