PDF malware analysis — malicious · 02d2ac8f567978b6

MALICIOUS

PDF

122.6 KB Created: 2013-06-24 11:15:47 +03:00 Authoring application: Microsoft® Word 2010

MD5: 7c9bc2eb32556493ab3fe28ebfad7610 SHA-1: 260b33474dfbc9cbec970f30e65358d11951e930 SHA-256: 02d2ac8f567978b632d098bb39d205bef514e53724af9795ba2907f5027851aa

616 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains JavaScript that triggers a launch action, executing cmd.exe. This action is designed to export an embedded file named 'temizpdf.pdf', which is actually a Windows executable. This chain of events indicates a malicious document intended to deliver and execute a secondary payload, likely for further system compromise.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 14

Adobe Reader Launch action command execution critical CVE exact CVE_2010_1240

PDF uses the Adobe Reader/Acrobat Launch action pattern associated with CVE-2010-1240: cmd.exe is invoked with attacker-controlled parameters, paired with an embedded/exported payload.
TrueType bitmap font + active content — CVE-2023-26369 related high CVE related PDF_CVE_2023_26369_RELATED

PDF embeds a TrueType font with bitmap tables (EBDT/sbix/CBDT) alongside exploit delivery indicators — CVE-2023-26369 exploits the sfac_GetSbitBitmap function in Adobe's libCoolType for arbitrary code execution. This CVE was actively exploited in the wild, but this rule does not validate the malformed EBLC/EBDT primitive.
Launch action critical PDF_LAUNCH

PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD

PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
/Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND

PDF /Launch action specifies an executable target with parameters '/Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\temizpdf.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
Embedded attachment masquerades: declared document, content is windows-executable critical PDF_EMBEDDED_FILESPEC_CONTENT_MISMATCH

An /EmbeddedFile attachment's declared filename extension or /Subtype MIME type contradicts the magic bytes of its decompressed content. The attachment is declared as a benign document or image but the bytes are an executable or executable-bearing archive. This is a deliberate deception used to hide droppers in PDF attachments and is a generic indicator of embed-and-drop weaponisation, independent of any specific CVE.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Tool.Agent-1388586
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.
/Launch action paired with attachment-dropping JS API high PDF_LAUNCH_PLUS_DROPPER_JS

PDF combines a /Launch action with a JavaScript API call that writes or opens an attached/external resource — the canonical shape of the CVE-2010-1240 /Launch + exportDataObject family. Benign PDFs do not pair these surfaces; the combination indicates a drop-and-execute chain regardless of the specific JS API knobs or /Launch target.
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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.zeustech.net/
- http://]hostname[:port]/path
- http://www.apache.org/
- http://www.microsoft.com/typography/ctfontshttp://fontfabrik.comYou
- http://www.microsoft.com/typography/fonts/default.aspx
- http://crl.microsoft.com/pki/crl/products/MicCodSigPCA_08-31-2010.crl0Z
- http://www.microsoft.com/pki/certs/MicCodSigPCA_08-31-2010.crt0
- http://crl.microsoft.com/pki/crl/products/MicrosoftTimeStampPCA.crl0X
- http://www.microsoft.com/pki/certs/MicrosoftTimeStampPCA.crt0
- http://crl.microsoft.com/pki/crl/products/microsoftrootcert.crl0T
- http://www.microsoft.com/pki/certs/MicrosoftRootCert.crt0
- http://www.microsoft.com/typography

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`temizpdf.pdf` `507dbee875a480064ce7bb6d4704ca56e261ac4f5855095aff4a68df0c254cf5`	pdf-embedded-file	PDF EmbeddedFile object 21 at offset 0x138D1	73802 bytes
Detection ClamAV: Win.Trojan.Swrort-5710536-0 Obfuscation or payload: unlikely
`javascript_obj0022_000.js` `4481750eeb54ce17a4fe0cc2a85f0b12cce1ad083f0270da72bc89994fca3170`	pdf-javascript-stream	PDF /JS object 22 at offset 0x1E508	57 bytes
`font_00_sfnt_off00000685.bin` `346d447c60325bab9db30abfb12df0c68fc2cadb13faad1c67605cab60510032`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x685	168868 bytes

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