PDF malware analysis — malicious · b1481295f97554ed

MALICIOUS

PDF

182.0 KB Created: 2010-03-03 03:42:28 +08:00

MD5: d019d71d0cbdec9d022a9240cd05fe92 SHA-1: bc11cb272f942af5bced5a7c92d914a8c391508a SHA-256: b1481295f97554ed0b8408c022d0db700ad41d2720b7fbd19199d8c100ecb62e

226 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

This PDF document is flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. The embedded files, including 'bin_adobeupdate.wav', suggest it acts as a dropper for further malicious content. The presence of JavaScript indicates an attempt to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9615

Heuristics 11

Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188

PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
ClamAV: Pdf.Dropper.Agent-7294052-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7294052-0
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 2 image(s), only 1 text block(s), carries a click-outward action, and is only 182 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic (matched inside decoded stream)
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 14

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0002.bin` `52f043a6fc7df55209bb983ed6c7d2cbf223d70807f647258f3320e58aef00a9`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xFC8	1465 bytes
`embedded_file_obj0003.bin` `af16e0cb98e636cca488174851c84e433b9acda855828256025165579bf7f91e`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x1283	973 bytes
`embedded_file_obj0005.bin` `226eeacc5eecef2a05ca480f144ff6936594e20b5c7672e8f29f25c8bea65a56`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x14D1	2928 bytes
`embedded_file_obj0006.bin` `4cb349134bdb5f1a1c03281df9b53128ebe947f235398a912a4f0a9f638b24d5`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x183E	200 bytes
`embedded_file_obj0007.bin` `1e96d28fce4fbbc1f0f529e2266e0d503636f29111a4ea3cb8464bc9f6b5250a`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x1931	835 bytes
`bin_adobeupdate.wav` `c29d09c36bd2a54132708e214e140c0f3481c40a9da403180068c56ed1a6278a`	pdf-embedded-file	PDF EmbeddedFile object 117 at offset 0x3D5A	79045 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.
`embedded_file_obj0121.bin` `c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb`	pdf-embedded-file	PDF EmbeddedFile object 121 at offset 0x146D2	85 bytes
`embedded_file_obj0122.bin` `dbbbfdd785e9d2b256dd4ac2faa0002c3d0c522765699437326e7216e03af174`	pdf-embedded-file	PDF EmbeddedFile object 122 at offset 0x14787	11882 bytes
`embedded_file_obj0123.bin` `bb76e51bb8b760432fa497d467a6211dbad4e19a09c332250c9ac2b240d23f80`	pdf-embedded-file	PDF EmbeddedFile object 123 at offset 0x14C5C	291 bytes
`bin_adobeupdate_1.wav` `2cb635ecc53755d20cabcf1f5d3764cd11978f546cbb0f7aeb4ed21566b1685d`	pdf-embedded-file	PDF EmbeddedFile object 135 at offset 0x15F79	95801 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.
`javascript_obj0092_000.js` `97e6c8fb70f6fedab160a41095c99dce3c9d53a0086d3a8d4e6d47cbe03dce61`	pdf-javascript-stream	PDF /JS object 92 at offset 0x323A	1946 bytes
`stream_013_off000029ca.js` `f574e4d51594d1a8fd22e125b109b827c437aa898edc78babb62dbb93f8744f8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x29CA	1532 bytes
`stream_014_off00002bb5.js` `4a1aca004cf20431c9a66dce85404a6411a54d881a6c257882260ffc972a13eb`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2BB5	870 bytes
`objstm_0126_00.bin` `ba08ce675f5a4edd23a5e7004fab9b39cd9f4a22a78e3315f0f79ca8628e5b98`	pdf-objstm-decoded	PDF /ObjStm 126 0 obj (inflated)	1974 bytes

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