PDF malware analysis — malicious · 68c3a81d423e37d4

MALICIOUS

PDF

652.9 KB Created: 2013-04-05 01:26:49 Authoring application: ImageMagick 6.8.2-3 2013-01-30 Q16 http://www.imagemagick.org

MD5: 342bf6a95fb31c6de6612ac87e153a30 SHA-1: bd8b12cb691bda3a5e0f74c82bd2ee637410dbee SHA-256: 68c3a81d423e37d451e5c3116c9f1ebc9fcbb36e048ef51f364610929aab763c

458 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript that triggers a launch action for cmd.exe, which in turn attempts to export an embedded file named 'admit-card.pdf'. This embedded file is detected as a Windows executable payload. The combination of a launch action, embedded executable, and JavaScript dropper strongly indicates a malicious intent to execute a payload disguised as a document.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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\\admit-card.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
/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
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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.imagemagick.org

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`admit-card.pdf` `8cf67cde38c2e7e020e8dc7e81953baaa042dff9e2699db0b684ff2b9b599cdf`	pdf-embedded-file	PDF EmbeddedFile object 21 at offset 0xA127D	15872 bytes
`javascript_obj0022_000.js` `adfe9cb5b243522a815057d0d739d3d713aae4c032bbad2c8dfac3060970979d`	pdf-javascript-stream	PDF /JS object 22 at offset 0xA2F45	59 bytes

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