PDF malware analysis — malicious · 0d9fc15e70c2fac1

MALICIOUS

PDF

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

MD5: b0b916b5ee0aa1ab0bc3de884794b490 SHA-1: 638a0b3919661c8c014a568c47f078db211f5ca9 SHA-256: 0d9fc15e70c2fac135544297cd426809a0bcf8fc94a7a03654ebeaf71da88a47

470 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains JavaScript that exploits multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) in Adobe Reader. The embedded JavaScript attempts to download and execute a second-stage payload from the URLs http://state-tx.net/e/load.php?spl=pdf_new and http://state-tx.net/e/load.php?spl=pdf_pack. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 12

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)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Dropper.Agent-7228405-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7228405-0
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)
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://state-tx.net/e/load.php?spl=pdf_new
- http://state-tx.net/e/load.php?spl=pdf_pack

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `32c132e1f68a7e2f666ddc31780e6c2e712f499a5ac0ae47d01d43a65bba95b6`	pdf-javascript-stream	PDF /JS object 32 at offset 0x414	128 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `cf6d9898777e05aef6b067dc0cc1aba20d719da49a961688e953aaee20a7e369`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4CE	121 bytes
`javascript_obj0036_002.js` `1a1fdff387c766e0b6cdf859a16d6bea003defa49392c66879cf4586f41872b9`	pdf-javascript-stream	PDF /JS object 36 at offset 0xFD	128 bytes
`javascript_obj0038_003.js` `701c5fe1fc239ab2cf4e510b3d5f09c0dd923ac74151374b2175a075f23eedba`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC2C	154 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `a9f48bfe0cd7f7c1789d3c78991aec2c8e4516dfab3dd8760e5255d3aec73e57`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	35 bytes
`legacy_pdfkit_stage_000.js` `f7f4a01de726ec67f320d0bac312087951c541e9f36263afa23cb0c9d4423ce0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5B7	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` `0d3f725fd325a96caefab419a812e5417b49ecdfa5a0a4e10579b146645e83cc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD4F	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` `ea14d106c68e44348ec47fbf9700829ac32a7d54c68744864320171296407e9a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13BC	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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