PDF / .TMP malware analysis — malicious · d319b4690320e37b

MALICIOUS

PDF / .TMP

672.7 KB

MD5: 574e4f7b970f41c2b2644c7a4cfb1275 SHA-1: 8c9ce8fa922177fbe0e1fc0dac36c87d6e9a209c SHA-256: d319b4690320e37b9ed62e351b095be183e9e88e2033086fff6f5413af3a1633

318 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that exploits multiple known vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The deobfuscated JavaScript indicates it is designed to download and execute a second-stage payload, as evidenced by ClamAV detections on both the PDF and the extracted JavaScript artifact. The file is classified as malicious based on these exploit attempts.

Heuristics 8

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
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: Pdf.Exploit.Agent-20823 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-20823
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.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `e9fbcf1cd985a0d529c7c337e129b1bd091f149bed6750b8341d3cc9cfa73d8f`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	8093 bytes
`legacy_pdfkit_stage_000.js` `3d94d8e16e8f85259910765a55af3cac06d3a40e42b1cc952725c705654112dc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x21B8	8394 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).

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