PDF malware analysis — malicious · c4ba27cc69d76d44

MALICIOUS

PDF

3.4 KB Created: 2005-09-29 09:27:34 UTC Authoring application: Adobe PDF Library 8.0

MD5: a001296a100971b4ccc9b9c3e9ad4f39 SHA-1: c897eaedf8ea307dc774bff1aaf251eb1609c4e4 SHA-256: c4ba27cc69d76d4405cf24175eaf8cba1749ed105379477247547bb45f5cc739

160 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: Malicious Attachment T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript and an embedded file, triggering heuristics for PDF_JAVASCRIPT, PDF_JS, and PDF_EMBEDDED. Crucially, it fires critical heuristics for CVE_2010_0188, indicating an exploit targeting Adobe Reader's LibTIFF component via an XFA image. Additionally, ClamAV detected a Win.Trojan.E-51 signature on an extracted artifact, confirming the malicious nature of the embedded content. The primary attack vector is likely phishing, leveraging a known vulnerability to execute a secondary payload.

Heuristics 7

Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188

PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
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.
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.
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
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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0004.bin` `3e46c92d206ca006df657aea3633b01b78cc2d9874062e841d7047ee00f4a410`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x1C6	35879 bytes
Detection ClamAV: Win.Trojan.E-51 Obfuscation or payload: unlikely

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