PDF malware analysis — malicious · 4c81cfb92091aa90

MALICIOUS

PDF

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

MD5: 773a073d5ae58db3c89aa6e19e1c550e SHA-1: 7618fb2d1fdfb9a8ea9746c53d60472ea5b5263d SHA-256: 4c81cfb92091aa908c1ac9d851ad03fab863d51eb7a125cbe2c2edeb006d4065

160 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript and an XFA form, which are leveraged to exploit the CVE-2010-0188 vulnerability in Adobe Reader. This exploit is designed to download and execute a malicious payload, as indicated by the ClamAV detection of Win.Trojan.E-51 on an extracted artifact. The attack pattern is consistent with a malicious document designed to compromise the user's system through a known PDF vulnerability.

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` `0527391b9a3c51d1f2f862e2fc9f6ec7db13dc922860ac9ab7f7400f0bc7526d`	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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