PDF malware analysis — malicious · 1347e46613b2de0b

MALICIOUS

PDF

85.5 KB Authoring application: cairo 1.7.4 (http://cairographics.org

MD5: f1bb5484ff751fb770bead5d2d7849da SHA-1: 14b340685c8fa6e46310ae8b3d228326c7cf7579 SHA-256: 1347e46613b2de0baac8480ad48bcb58866e0aab29626ce8aafda3c3e9a5b060

516 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that utilizes the `exportDataObject` function to launch an executable payload named 'july09commute.pdf'. This payload is likely a secondary stage, as indicated by the ClamAV detection of 'Win.Trojan.Rozena-131' on the extracted artifact. The exploit targets CVE-2010-1240, leveraging a launch action to execute 'cmd.exe' with specific parameters, which is a common technique for downloading and executing further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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 (if exist "%HOMEPATH%\\My Documents\\july09commute.pdf" (cd "%HOMEPATH%\\My Documents"' — 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.Exploit.Agent-13818 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-13818
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://cairographics.org
- https://psportal.mantech.com/psc/exprd/EMPLOY

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`july09commute.pdf` `f09ad3f69aa0cb562239973be8cc9321f57b01be4ea7d5b2f8f47abe2fea2941`	pdf-embedded-file	PDF EmbeddedFile object 79 at offset 0x10467	37888 bytes
Detection ClamAV: Win.Trojan.Rozena-131 Obfuscation or payload: unlikely
`javascript_obj0080_000.js` `a7e6a230ca3a44dc7c83c49f5fc903c439a0bf317f02fbea012a7c8f72ebf16e`	pdf-javascript-stream	PDF /JS object 80 at offset 0x1511E	62 bytes
`font_00_sfnt_off0000c49d.bin` `d60690518ed5c088ab10bde5e7a0d629f39b67f02bea864d08a9f522db15eae3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC49D	17244 bytes

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