PDF malware analysis — malicious · c6086d158178ced0

MALICIOUS

PDF

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

MD5: 54d4aa826d7590c77c502d17cde04790 SHA-1: 09393e3ce1d06325aa09122805c0909dab254044 SHA-256: c6086d158178ced0fd3da8b71c8862e0ffc310719852401306cbc5f618967187

396 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes `eval()` and `String.fromCharCode()` functions, indicative of obfuscation. Critical heuristics identify exploitation of CVE-2007-5659 and CVE-2008-2992, which are known PDF vulnerabilities often used to execute arbitrary code. The presence of extracted JavaScript files, including a deobfuscated version, further supports the conclusion that the document is designed to download and execute a secondary payload. ClamAV detections confirm the malicious nature of the file and its extracted artifacts.

Heuristics 10

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. (identified after JavaScript deobfuscation)
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. (identified after JavaScript deobfuscation)
ClamAV: Win.Trojan.Agent-36167 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36167
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
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `71966ea5ec8a3a821623b07e06c317e4809a5d79960d3de584a3c5de7141f811`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	11060 bytes
Detection ClamAV: Win.Trojan.Agent-36167 Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `41cae4e5b50628819fd129b84f3bd8a1aeb79ebf0589473b05b862be0b8d63f5`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x43B	3204 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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