PDF malware analysis — malicious · e70214c41a194a9c

MALICIOUS

PDF

58.6 KB Created: 2010-05-18 06:04:38 +02:00 Authoring application: Writer (via OpenOffice.org 3.2)

MD5: bcc7d3499f2cd572e9d12f9d2bf5b477 SHA-1: d841139e70770ba2ecdd08d8a1efe7ea7d727874 SHA-256: e70214c41a194a9c673e008f293a23922f563cd997e0616bb01ddab4f1a32833

504 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 User Execution: Malicious Link T1027 Obfuscated Files or Information T1140 Deobfuscate/Decode Files or Information

This PDF file contains a JavaScript action that triggers a launch action, specifically targeting cmd.exe. The critical heuristic PDF_EMBEDDED_PE_PAYLOAD indicates that an embedded Windows executable payload is present, masquerading as a PDF file named 'se-in.pdf'. ClamAV detections further confirm the malicious nature of both the PDF and the extracted payload. The overall attack pattern suggests a lure to execute a malicious payload, likely a trojan or agent.

Heuristics 12

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\\se-in.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.
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 58 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`se-in.pdf` `137b9381b7519c4152afc929383db3839796cc1d64e5161a5584272b5b4c7526`	pdf-embedded-file	PDF EmbeddedFile object 23 at offset 0x9943	37888 bytes
Detection ClamAV: Win.Trojan.Rozena-131 Obfuscation or payload: unlikely
`javascript_obj0024_000.js` `bb728463b0d35dabcca9bcc71d5f786a6b9a2021cc2d5e00263b223cb25b9b55`	pdf-javascript-stream	PDF /JS object 24 at offset 0xE67F	54 bytes
`font_00_sfnt_off00004f2d.bin` `54f6a50d18ba607328a558702befc3092942ebe2485c96226a1b26b0bbc80320`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F2D	29760 bytes

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