Malicious PDF — malware analysis report

Static analysis result for SHA-256 a384d33094c570a3…

MALICIOUS

PDF

1023.4 KB Created: 2010-09-19 16:20:06 +08:00 Authoring application: WPS Office 个人版 (via PDFlib 7.0.3 (C++/Win32))
MD5: 6fcafbeb3159e41ef0ae07b7e0631f59 SHA-1: 47511b324d130a059ea0815a2fcba0c5ab3bc3dd SHA-256: a384d33094c570a36465fd5772e03ff5718e451f7236a8eff62fbe68afe62c9d
214 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript T1204.002 Malicious Link

This PDF file contains embedded JavaScript and exploits the CVE-2010-2883 vulnerability in Adobe Reader's CoolType SING font parsing. The embedded JavaScript, found in files like javascript_obj0026_000.js, is likely responsible for downloading and executing a second-stage payload. The presence of a secondary embedded PDF with similar suspicious findings further supports this attack vector.

Heuristics 10

  • Adobe Reader CoolType SING font exploit — CVE-2010-2883 critical CVE likely CVE_2010_2883
    PDF embeds a TrueType/OpenType font with an actual SING table and pairs it with JavaScript heap-spray shellcode. This matches the public Adobe Reader CoolType SING exploit shape for CVE-2010-2883.
  • 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.
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xfa/promoted-desc/
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/
    • http://www.xfa.org/schema/xfa-locale-set/2.7/
    • http://www.xfa.org/schema/xfa-locale-set/2.6/
    • http://www.xfa.org/schema/xfa-form/2.8/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 12

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0026_000.js
2f574ea0a0abb643798c6edf545b9a2510056a799ef48c2f415cee8e337043b2		 pdf-javascript-stream PDF /JS object 26 at offset 0x47BF 9909 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
font_00_sfnt_off000149fa.bin
422bc5698ba5d9d4818f6a2d8b3abca2f723e713b44a15c390139d2c976a1388		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149FA 65932 bytes
font_01_sfnt_off0001e85c.bin
7e24ee16c8b09ee74d61445f29c3c0a95abfdf17fc1008606394f159dbd0c106		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E85C 65932 bytes
font_02_sfnt_off000286ba.bin
57e24925bc6bdb98d38e8b4ba3b87f80f75c5e49ea9a522486790d7dc6848549		 pdf-font-stream PDF embedded font (sfnt) at offset 0x286BA 65932 bytes
font_03_sfnt_off000324e1.bin
1f068d668b316fcb46f0801be00137fb749cc7fda5ca15e442829d6c303d8f99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x324E1 65932 bytes
font_08_sfnt_off000cddd6.bin
57006ee927bb8cfbc3451f47251cfd901cd94b84a7bc436ba5b119deb93b6046		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDD6 419640 bytes
font_09_sfnt_off000f60b5.bin
80831210d589fe5af706916a89c2b19cd64443078b7847a4eb68f87e68c0d13d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF60B5 135480 bytes
font_10_sfnt_off000fa626.bin
99fb14b6dd21af8db124b1a4dc18fcabaa0cb2f52497e96023a027fdea3bfbbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA626 35652 bytes
javascript_obj0026_000_1.js
ed674281bd93cf933360ff8e1009bced974ec587d0dbd04d36965a5acf604fd7		 pdf-javascript-stream PDF /JS object 26 at offset 0x47BF 8527 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
javascript_obj0026_001.js
ed76f23125b9c373371d2a132cc444c2f3d709da5ef85e4dafab1b8ed50f9e5a		 pdf-javascript-stream PDF /JS object 26 at offset 0x47BF 3369 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
polyglot_child_pdf_off0003ca8f.pdf
74359a2b0526e498c44c2c0b7be118d9403bead5cda0a45699e724c3752c9203		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x3CA8F 799479 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 10 long base64-like blob(s).
polyglot_child_pdf_off00090017.pdf
a3e6ca82946d0724765cfcb7b7b16f2e943eb3c0f45040c138afd031db3f00fc		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x90017 458095 bytes

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