PDF malware analysis — malicious · c62cf59d13b9d70b

MALICIOUS

PDF

1.95 MB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 74561f759feeaf60c01884a8dcb5b3ce SHA-1: d166eefeab53c218618eef5bba640b5d1a08339e SHA-256: c62cf59d13b9d70bb89b256488766a91907bd6dad9b4cfb731e06d208ba4f2ee

376 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF document is identified as malicious by ClamAV (Pdf.Dropper.Agent-7301568-0) and contains critical heuristic firings for CVE-2007-5659 and CVE-2008-2992, indicating exploitation of known PDF vulnerabilities. The embedded JavaScript stream, named 'javascript_obj0013_001.js', is also flagged as suspicious. This script likely facilitates the download and execution of a second-stage payload, as suggested by the 'EXTRACTED_FILE_CLAMAV' detection of 'Win.Trojan.Agent-36168'. The OpenAction trigger further ensures the automatic execution of these malicious components upon opening the PDF.

Heuristics 9

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
ClamAV: Pdf.Dropper.Agent-7301568-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7301568-0
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.
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)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `400eb526d590acebabeea07aff8f0c76e35aabba15414a3f2ccec97cc88b074c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x841	3225 bytes
Detection ClamAV: Win.Trojan.Agent-36168 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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