Malicious PDF — malware analysis report

Static analysis result for SHA-256 601d106bfcb6f7f8…

MALICIOUS

PDF

31.9 KB Authoring application: cairo 1.12.2 (http://cairographics.org
MD5: acd31d3041818eec194ce8deedcc9200 SHA-1: 89f125e5fed517e57b0d10b80c6f24bf13659fd0 SHA-256: 601d106bfcb6f7f8b33a8105a874b5a5589fc14b8b7b53b43cddd5a765b4810e
356 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains JavaScript that triggers a launch action, specifically targeting cmd.exe with parameters that suggest it will execute commands and potentially drop a file named 'google_o.pdf'. This is further supported by heuristics indicating a PDF launch action, command execution via cmd.exe, and a dropper API. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 10

  • 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
  • /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\\google_o.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 31 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
  • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
google_o.pdf
0996be0031f272564ea3f9cdc2f5c1f72dbb101e8cb5c547dc2ebaa5a0869f30		 pdf-embedded-file PDF EmbeddedFile object 19 at offset 0x7A95 54 bytes
javascript_obj0020_000.js
eede77e3588bd1886ef98d70788b5aa82c55146b3bc4b85e7db7ef9f27ed62d0		 pdf-javascript-stream PDF /JS object 20 at offset 0x7AD8 57 bytes
font_00_cff_off00006ab0.bin
2612d424c301ee8a40675c777c354bfe2bc019c981d653a1bebceadef6a8d8d5		 pdf-font-stream PDF embedded font (cff) at offset 0x6AB0 2135 bytes

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