PDF malware analysis — malicious · 98f1dedd9240dd59

MALICIOUS

PDF

103.6 KB Created: 2008-04-01 12:49:13 Authoring application: PScript5.dll Version 5.2 (via GPL Ghostscript 8.15)

MD5: a9463e7bd450b88fc1926d3475f0839f SHA-1: 991ca40255e41f173022519c968223fd25732016 SHA-256: 98f1dedd9240dd593bd938d5d5d159a0f5d1f4efd030c7f6058b1051f688e50a

484 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File T1059.003 Command and Scripting Interpreter: Windows Command Shell T1566.001 Phishing: Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF document contains embedded JavaScript and a Windows executable payload masquerading as a PDF file. The critical PDF_LAUNCH_COMMAND heuristic indicates that the sample attempts to execute 'cmd.exe' with specific parameters, likely to deploy the embedded executable. The embedded executable itself was detected by ClamAV as 'Win.Trojan.Swrort-5710536-0', and the PDF was detected as 'Pdf.Tool.Agent-1388586'. The combination of these factors strongly suggests a malicious intent to deliver and execute a secondary payload.

Heuristics 11

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.
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\\RPG_prislista.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.
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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`RPG_prislista.pdf` `a9ea849829dffbd58dda54f510c9e60d684d7a4d66d80b72d4f551a1c2655032`	pdf-embedded-file	PDF EmbeddedFile object 37 at offset 0xEE53	73802 bytes
Detection ClamAV: Win.Trojan.Swrort-5710536-0 Obfuscation or payload: unlikely
`javascript_obj0038_000.js` `c00c31613cf89be436db078855538264f0f5ad01e0adf56130b3094668e5c4ae`	pdf-javascript-stream	PDF /JS object 38 at offset 0x19A4E	62 bytes

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