PDF malware analysis — malicious · e26e8c14b2ba4c9d

MALICIOUS

PDF

291.8 KB Created: 2008-02-27 16:58:09 +08:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 6.0.1 (Windows))

MD5: 5dc6b72df073c9c60b2208a54d979100 SHA-1: 6f69eded13c1ca85207559a3bffd2d7dfd12eb9d SHA-256: e26e8c14b2ba4c9da086e55d1a9f0a91bc4f7c3aaf0ab286e28b366a1775be3a

292 Risk Score

Malware Insights

MITRE ATT&CK

T1190 Exploit Public-Facing Application

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 firing suggests exploitation of a vulnerability related to Collab.collectEmailInfo. The embedded JavaScript file, 'javascript_obj0017_000.js', is likely responsible for downloading and executing a secondary payload, as suggested by the 'Suspicious extracted artifact' heuristic. The ClamAV detection further confirms the malicious nature of the file and its extracted components.

Heuristics 10

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. (matched in decompressed stream)
ClamAV: Win.Trojan.Dropper-82 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Dropper-82
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact high 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.
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
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/xhtml
- http://www.xfa.org/schema/xfa-data/1.0/
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/iX/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/

Extracted artifacts 11

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0017_000.js` `a855e1484b6aa802ce0f6f936ba6d5b5bb5556ec34d1f510cb7f17c768fa4311`	pdf-javascript-stream	PDF /JS object 17 at offset 0xA20	4622 bytes
Detection ClamAV: Win.Trojan.Dropper-82 Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`icc_00_off0000f803.icc` `2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e`	pdf-icc-profile	PDF ICC profile at offset 0xF803	3144 bytes
`font_00_sfnt_off00010667.bin` `543c20bf0cd28b05a864fea7d81c567ca049db57068bcd3e25da9bddcb64e50e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10667	23776 bytes
`font_01_sfnt_off00012b3e.bin` `4466d8e0c418cbab3018d8c3f589465ed721204faf4019eb774bfdb71d611301`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B3E	20220 bytes
`font_02_sfnt_off00014b3b.bin` `5a50a0b8e03fbac72728b51773ea28635c3263e4e37fe6636820af1f00f651d9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14B3B	25056 bytes
`font_03_sfnt_off00017778.bin` `eac32e10526389e7a894932dc916fecc858f5b14073cc9ee0604206fdf3d49fb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17778	13040 bytes
`font_04_sfnt_off00019256.bin` `98490cbd39abdf4058540761ab08039963b87d84f2696185b4c79575c7fb32a7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19256	33116 bytes
`font_06_sfnt_off00024e3f.bin` `bc521deb305efa437c9df04c35fde029ad50227e935fbb9543ea19b88514d318`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x24E3F	66612 bytes
`font_07_sfnt_off0002bbdf.bin` `3c1ed3443159b439c72b28d85e8f24ae7b67c6c6a6f20f5e556b970b2327fd3b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2BBDF	30964 bytes
`font_11_sfnt_off0003ef53.bin` `7d408599b02125279957ec7f14b14f2dd1c1a866e0597dba259578b509c18575`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3EF53	14436 bytes
`font_12_sfnt_off000409af.bin` `48ab693f4995214bee858f27d6b8aeb1d0cf190d3bf9f0035d75aa1ca2ee1541`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x409AF	29488 bytes

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