PDF malware analysis — malicious · b120af8881728528

MALICIOUS

PDF

5.5 KB

MD5: e72a40a5a79557e37a8b09fd14f3bd6a SHA-1: 21a08b11042e00c4a74baace35afe697f93b4b3c SHA-256: b120af8881728528e7c5f50ed1c8b74bf56abd78f6d052cc4e70ac7a1910c534

190 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing via Service

The sample is a PDF document flagged by ClamAV as Pdf.Exploit.CVE_2010_0188-10, indicating it exploits CVE-2010-0188. Static analysis also identified an embedded script payload within a PDF stream, which was further confirmed by ClamAV detecting a malicious extracted artifact. The ML classifier assigned a very high probability of maliciousness. The document body content is not human-readable and appears to be obfuscated or corrupted data, providing no direct clues about the lure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.CVE_2010_0188-10 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.CVE_2010_0188-10
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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
`embedded_file_obj0006.bin` `f3f40c160fe84514b865483eec6de57b0e9939d94132ce441604bf58af146bf3`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x410	33691 bytes
Detection ClamAV: Pdf.Exploit.CVE_2010_0188-10 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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