PDF malware analysis — malicious · 7bc8efad087f0e0b

MALICIOUS

PDF

135.8 KB Created: 2010-06-11 11:09:09 +08:00 Authoring application: easyPDF SDK 6.0 (via BCL easyPDF 6.00 (0333))

MD5: 78b7d563b944b0f502970bd155c1fdb9 SHA-1: fcfeef60b47f7448598cb3c64de7b951ca953580 SHA-256: 7bc8efad087f0e0b32564bf19fd68ee6d54e5fce1ea2abfd5a2340cfbf8e3e30

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript and a secondary embedded PDF, indicated by multiple PDF-specific heuristic firings. The presence of 'unescape()' calls and RichMedia (Flash) suggests an attempt to execute code or exploit vulnerabilities. The polyglot nature and embedded artifacts point towards a multi-stage attack, likely for payload delivery.

Heuristics 8

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)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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)
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload (matched inside decoded stream)
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off00000372.bin` `fea0191f775caff04406452c6dd0001c2a381dc3ecbb0e58e959023ba6734eb0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x372	4458 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`objstm_0015_00.bin` `cbd11d2ce487f41cb2e696adc35306d2f3d38b7de6eab25b0e0d07f05d693f12`	pdf-objstm-decoded	PDF /ObjStm 15 0 obj (inflated)	912 bytes
`polyglot_child_pdf_off0001f397.pdf` `2fef76444f3628aa0ef25f4cff5e652700a5e43856f12e502e71171bd7cd56e1`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x1F397	11159 bytes
`polyglot_child_pdf_off00020741.pdf` `0b1c923c8a0028794f3a3244dc498786746334f394e41678cc58ffbeb707d0a8`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x20741	6125 bytes

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