PDF malware analysis — malicious · 135f934486811083

MALICIOUS

PDF

1.95 MB Created: 2009-11-11 10:52:49 +03:00 Authoring application: PScript5.dll Version 5.2 (via Toldihiqanopo)

MD5: 114ce3c4b70b8ca22470579e8e31bcda SHA-1: a40bab9e9fbc83b768a87a3b591d1c14d8c6ebe3 SHA-256: 135f934486811083fdda83bcf985b3b748023aab4415b4110d45fa7e5d36cd92

538 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: JavaScript

This PDF file is heavily laden with exploits targeting multiple Adobe Reader vulnerabilities, including CVE-2009-0658, CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are designed to deobfuscate and execute embedded JavaScript. The presence of JBIG2 and JPXDecode filters, along with active content, further indicates malicious intent. The primary function appears to be the execution of a second-stage payload via the exploited JavaScript.

Heuristics 14

Adobe Reader JBIG2Decode page-word shellcode exploit critical CVE likely CVE_2009_0658

PDF combines JBIG2Decode image streams with an OpenAction JavaScript launcher that decodes a page-word XOR shellcode stage. This matches the in-the-wild Adobe Reader/Acrobat JBIG2 image-stream exploit cluster associated with CVE-2009-0658.
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)
JBIG2 + active content high CVE related PDF_JBIG2_ACTIVE_CONTENT

JBIG2Decode appears with JavaScript/XFA/RichMedia — a related indicator for JBIG2 parser-exploit families including CVE-2021-30860 and CVE-2009-0658, but not a unique CVE fingerprint.
JPXDecode + active content — JPEG2000 CVE-family indicator high CVE related PDF_JPX_CVE_2018_4990_RELATED

PDF uses /JPXDecode (JPEG2000) alongside JavaScript, XFA, or RichMedia indicators. This matches the delivery pattern for Adobe Reader JPEG2000 parser exploit families, including CVE-2018-4990, but does not prove the exact malformed JP2/JPX primitive.
Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
ClamAV: Pdf.Exploit.Agent-36176 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36176
JBIG2Decode filter medium PDF_JBIG2

JBIG2 image decoder present — historically used in zero-click exploits
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://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 15

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off0001086b.bin` `c7ed63a15b49e526a15d714e00e246bb82ae6889c5ebaaac77abd4880558ccfd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1086B	50896 bytes
`page_word_xor_stage_000.js` `f79cb6396492fc3f84d20f988f26cb4025557f9420c0051b290e67aa8c54f506`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0x05) at offset 0x7C725	3215 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`jbig2_00_off00109077.bin` `84a26abf56ddd28d9b89bd9c5d61a417dd5e2c74bdc01c939b7256f6175a56ce`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x109077	6299 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.96, consistent with packed or encrypted content.
`jbig2_01_off0013b537.bin` `99436982f4f196d5e04ed675d1f9db571c1df8ed22839d1c2e6e123901569a74`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x13B537	6086 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.95, consistent with packed or encrypted content.
`jbig2_02_off0016d1d4.bin` `b1155d285af01c1cbf7b1be7ad995a029be126a4a47807285e43204f586b737e`	pdf-jbig2-stream	PDF JBIG2 stream at offset 0x16D1D4	5891 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.95, consistent with packed or encrypted content.
`icc_00_off0001c224.icc` `2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e`	pdf-icc-profile	PDF ICC profile at offset 0x1C224	3144 bytes
`font_00_sfnt_off00002991.bin` `7ff6a25067a0b06f563181fa8ce0138c07d033eb1ca846b9e2784d007594c9a8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2991	65732 bytes
`font_01_sfnt_off00018316.bin` `9dd2069ec9ac2c7866e57f5053471a2a18fe74a5d7a5d96c70ff67bdda74ec4e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18316	31528 bytes
`font_02_cff_off0007fccf.bin` `4aea9f4e26ea64e6f14e94753a773d83929f9803d3bda814295f29e58074f792`	pdf-font-stream	PDF embedded font (cff) at offset 0x7FCCF	4174 bytes
`font_03_cff_off00080b7d.bin` `da402ed985cf62a352f17c33be03e3314c53392a70c3dab8d4e1f5b4a78fe6e3`	pdf-font-stream	PDF embedded font (cff) at offset 0x80B7D	12991 bytes
`font_04_cff_off00083217.bin` `2ebc2e995d8b2e7731f15f41d6bcad4a887862a3c3c51e58ee1574eb89be16bf`	pdf-font-stream	PDF embedded font (cff) at offset 0x83217	5499 bytes
`font_05_cff_off000a3f80.bin` `f174867ac133914f79be0914e96e30af9d8b8966e9f25b0c749b82b3165a8fc0`	pdf-font-stream	PDF embedded font (cff) at offset 0xA3F80	6634 bytes
`font_06_cff_off000a573d.bin` `4edee329a197c47b1151c013d65db5ed9297584935517cdd9339bf672ec1eaad`	pdf-font-stream	PDF embedded font (cff) at offset 0xA573D	3561 bytes
`javascript_obj0020_000.js` `681fb8346e2ca0f375d9beeba24e43a3b31939102901566b68fd3c4bfab16eb4`	pdf-javascript-stream	PDF /JS object 20 at offset 0x29CB	284103 bytes
`polyglot_child_pdf_off0007bd3f.pdf` `b0dc90fe84a48b3302afb4f5d81eca0b30ec65c2b7d93b583d6bfa90a43ae2f2`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x7BD3F	1540801 bytes

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