PDF malware analysis — malicious · caaa05e52d956f47

MALICIOUS

PDF

294.7 KB Created: 2011-09-20 10:38:42 +08:00 Authoring application: WPS Office 个人版 (via PDFlib 7.0.3 (C++/Win32))

MD5: 60eb2b86d9028d4620c5999880328e83 SHA-1: 2ac5e155333b530ae83f40092efa9fc9aab96eaa SHA-256: caaa05e52d956f4741a1023e13d6b19356670c127099913d59644e0e84391072

132 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF exhibits multiple suspicious characteristics, including embedded files and JavaScript. The presence of RichMedia (Flash) and XFA forms, along with a critical finding of a secondary embedded PDF with suspicious static findings, strongly suggests an attempt to exploit vulnerabilities or deliver further malicious content. The embedded files are likely part of a multi-stage attack.

Heuristics 7

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.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector (matched inside decoded stream)
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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. (matched inside decoded stream)
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. (matched inside decoded stream)
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic (matched inside decoded stream)
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 18

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0001.bin` `3000b3469a8bd553f177da3f507a5ea2271a3dee1fd5d5343f41950837af583c`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x3B36	163 bytes
`embedded_file_obj0002.bin` `66b82b096ae83103365f40b9b767a5582b0a497e4589e7b9323eac0320c61808`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x3C27	1670 bytes
`embedded_file_obj0003.bin` `e763ac63c3d21786709e7f462b463575525d0e344202f42dbb96897a01541e78`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x3F43	785 bytes
`embedded_file_obj0004.bin` `720c47f19e6a058099295d18a16b7149cc73fe497eb78821ea810f3192228dc4`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x4138	150 bytes
`embedded_file_obj0005.bin` `c8a82f67dfd8d68c2f8fe494ca2deee4604701c8f02863bf87d222b992e45de9`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x4209	2955 bytes
`embedded_file_obj0006.bin` `4cb349134bdb5f1a1c03281df9b53128ebe947f235398a912a4f0a9f638b24d5`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x4583	200 bytes
`embedded_file_obj0007.bin` `4273cd319df227c91b92e5509527bb4f6e1abfb3aa2beec2fb2adb93a8671f62`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x4676	835 bytes
`embedded_file_obj0008.bin` `4a60a9864cdf7382475d51051a03fdc43b32c31eb508893ccfccece34957f9f1`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x484D	56 bytes
`stream_002_off000003ed.js` `529357503ec67b623d2a12816cdeea62bd639f2b4ff4e568b01c96cc3f5bfc6f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3ED	1363 bytes
`stream_003_off000005ca.js` `e985b5df65c8c3cf732a9074b575fbc594c1c7f0bccc0994182ec7e5c0f7308a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5CA	902 bytes
`objstm_0047_00.bin` `856830b101f28eaa61f2ccb44204fecaa2d0a9658055009fda363a9d3056ff76`	pdf-objstm-decoded	PDF /ObjStm 47 0 obj (inflated)	2543 bytes
`font_00_sfnt_off0001051d.bin` `4a8ba21f8a060145da2379a82d790e1e5622a70e943fae5ccacfca335aabb5a1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1051D	186976 bytes
`font_01_sfnt_off00016498.bin` `f51e8795639ea834803881478e98bfacd7b76f0c9211e883601cfd74111f3b70`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16498	49192 bytes
`font_02_sfnt_off0001791c.bin` `2d003ad081fb423265deea934fc4e9b8ff176e8af8bf5b5a0220198447101051`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1791C	263700 bytes
`font_03_sfnt_off00022ae3.bin` `278dc667b9c5e9d140c4dc2fd4e49226b14b5e9b146ba98d48b96bd1e51d29b6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x22AE3	21440 bytes
`font_04_sfnt_off00024e04.bin` `e68fef97414734b726580b550b6b99be7cf63497a556792d7be08c0d747c1ec1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x24E04	165640 bytes
`polyglot_child_pdf_off0000f48b.pdf` `fc85134f04f37059bfa7c044e70b1ffaf5661561f36a6546c36e1045b4d36e37`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0xF48B	239199 bytes
`polyglot_child_pdf_off000482fb.pdf` `9a95102ad6b4d58a9a742832f61490a27e9b62855fe295b13214addfda321ad3`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x482FB	6127 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.