Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf7efcf1d6966d6…

MALICIOUS

PDF

506.4 KB
MD5: 60c22d4433b23b9b54da8e91cd82ffd0 SHA-1: f40347772dcd846a34b79c3b4eae3965a71bad08 SHA-256: 2bf7efcf1d6966d6a670a15e7d9bcd81ffb0f81c6ef04ac7615b1e6613a427fb
116 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 presence of PDF_EVAL and PDF_FROMCHARCODE suggests obfuscated JavaScript code is being executed. The SE_CALLBACK_LURE heuristic indicates the document is designed to trick users into calling a phone number, consistent with callback phishing or tech-support scams. The extracted JavaScript file, 'javascript_obj0159_001.js', likely contains the payload for this lure. The embedded URL 'http://ns.InsiderSoftware.com/fontlist/1.0/' is of unknown reputation and could be related to the malicious activity.

Heuristics 7

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • String.fromCharCode medium PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically (matched inside decoded stream)
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.
  • 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 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://ns.InsiderSoftware.com/fontlist/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0159_001.js
93c9bd0c2c9633721c4876515b79c374bb9470d9a26e13ac2db5f5046a8e03b6		 pdf-javascript-stream PDF /JS object 159 at offset 0x4AE35 516 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
javascript_obj0160_002.js
630d4430db1037a125ea8f70714d59a39cb6c335d06e00d8737335d22b32651e		 pdf-javascript-stream PDF /JS object 160 at offset 0x4AFA9 2599 bytes
icc_00_off00041b8a.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0x41B8A 3144 bytes
font_00_sfnt_off00003bef.bin
5f96e1e90c4ef56487c91d02c05141dca0967f8e2bbd5d67be6c4f381f0afa79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BEF 62160 bytes
font_01_sfnt_off0000d045.bin
b661c2e877dd6b7625208ae148d736aedb24eda2d4f014262cbb7f958f538ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD045 71216 bytes
font_02_sfnt_off0001a0a0.bin
8b62f203a4ab5c2ac76368029c584b4fa12fffc17f3b6e4e43a9997416807d21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0A0 11156 bytes
font_03_sfnt_off0001c051.bin
d375c22ace40f0b973d7308d85023b2e0e49d40dc51da45552d116868346475e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C051 37232 bytes
font_04_sfnt_off00022ea8.bin
afeb9e1e920aae3aca3f295f1bbccba46b16423dac14b1b5fde4b661de9198cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22EA8 46764 bytes
font_05_sfnt_off0002b723.bin
95592346b00d039686aa3d7e22eae3d52b011e7e842a5c123f73e89ea766cd35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B723 22628 bytes
font_06_sfnt_off000377bc.bin
6cf6df6beee88aa138f821122d0c1969b348cebe09cafe5b5f6a7eb8c27107a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x377BC 32640 bytes

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