PDF malware analysis — malicious · fcee2ab53aa94a4c

MALICIOUS

PDF

7.3 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: 4bbc0fd42feac8a64c17d506181a2bc7 SHA-1: 86e60b7851c5da8c5898ddc60023dc8e11840ef7 SHA-256: fcee2ab53aa94a4c3ceea865d0448b39bff7a29b83fc65bfb72adc8cd06c93fc

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged through embedded and obfuscated JavaScript, including the use of eval() and unescape() functions, to execute arbitrary code. The ClamAV detection of 'Pdf.Dropper.Agent-7328166-0' further supports its malicious nature as a dropper. The primary function appears to be the execution of a second-stage payload via these exploits.

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)
ClamAV: Pdf.Dropper.Agent-7328166-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7328166-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `608295e245ef177e49f1c25cf87231690db8ab92d674c36b74917a3c26adcd5e`	pdf-javascript-stream	PDF /JS object 32 at offset 0x41A	130 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `1eb7193426d8a4da0e8513d49e0d97ac004ba648b11bc7255ebd4d7aa4ab179e`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4D6	127 bytes
`javascript_obj0036_002.js` `b468bbcb89b993105f824605ac17226477bf90169fbb1d2d130f05efc501f4bd`	pdf-javascript-stream	PDF /JS object 36 at offset 0x101	138 bytes
`javascript_obj0038_003.js` `7f3df4603d27ef098b0f6760fe7e0b1c5275e03d1213b84c209afa25196f75e2`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC3C	162 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `47bed9480144cb2573aeb132264eb7c4d988446270561f81e88d18deea3388b2`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	39 bytes
`legacy_pdfkit_stage_000.js` `24b441aff0e215596e7f94d50fd179189ad3b9367f156a25bcb466a98d500f65`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5C4	1634 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `a6b7b9a3883eac8bfb2142ffaf630ece74bd0b8de05cd438609e941aec1b4dcb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD69	1800 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `e0890dce8f4970693da64c1393f6ec28749b8449b07cc6dc8df2489839f0f250`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13D6	2938 bytes
Detection ClamAV: No threats found 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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