PDF malware analysis — malicious · 51609a7995c1822a

MALICIOUS

PDF

12.3 KB

MD5: 5c1e86e3169d4e4e7b2d16950af14d73 SHA-1: 022ccba8e426c0d1dd4d72c1e2db3eb81663d4e6 SHA-256: 51609a7995c1822a1f5b0fe848fe89388395257fbcf263d2e69e9c782c679108

416 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

This PDF file exploits multiple known Adobe Reader vulnerabilities including CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The embedded JavaScript, which was deobfuscated and extracted, is responsible for triggering these exploits. The primary function of the exploit is to download and execute a second-stage payload, as indicated by the critical ClamAV detections on the file and its extracted artifacts.

Heuristics 9

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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-36806 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36806
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.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `99881f0c6ae00b4ba65ec951c430fcf0b915755b4f0736243dc902a1950ffd0f`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2C2	11658 bytes
Detection ClamAV: Pdf.Exploit.Agent-36837 Obfuscation or payload: unlikely
`split_char_table_stage_000.js` `b1b65d7f2c78bafddce27bb2e5d692a594dc513c636f36059ce223a199a2f647`	deobfuscated-js	split character-table join decoded JavaScript at offset 0x392	3864 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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