PDF malware analysis — malicious · 839910b891ae3d67

MALICIOUS

PDF

2.8 KB Created: 2009-10-07 07:03:46 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 95b18bef67f7823b82d521fa8c7576f6 SHA-1: fd479791cc84fb85da3ee7b7ea0f98ec9ef2e013 SHA-256: 839910b891ae3d675b8cd6aae29e9e1a680823da100d09ddd0c64eb2384c1d87

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

This PDF file contains embedded JavaScript, triggered by the OpenAction, which exploits the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. The embedded JavaScript is obfuscated and likely downloads and executes a second-stage payload. The ClamAV detection 'Pdf.Dropper.Agent-7278145-0' further confirms its malicious nature as a dropper.

Heuristics 7

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (matched in decompressed stream)
ClamAV: Pdf.Dropper.Agent-7278145-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7278145-0
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `eb7b36986780c4e67d32279acf4644fc8cc8edc13e5f28b7f98d3745adaf895e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x366	2784 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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