Malicious PDF — malware analysis report

Static analysis result for SHA-256 610751639c839fd1…

MALICIOUS

PDF

107.3 KB Created: 2018-06-12 09:41:10 -04:00
MD5: c54f11845eecc75a6423e0cc89891f54 SHA-1: 5f32ab5a697e28d2ecadf962c21db01e3c232f7a SHA-256: 610751639c839fd17ec43e5f44792b4a3f61bfcbf2534f82854736412f76ff79
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document exploits a fake Acrobat update lure to trick the user into executing embedded JavaScript. This script then attempts to submit form data to a remote URL, likely to download and execute a second-stage payload. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9477

Heuristics 8

  • PDF auto-runs JavaScript form submission on open critical PDF_OPENACTION_JS_SUBMITFORM
    PDF uses /OpenAction to run JavaScript that calls submitForm() with an external HTTP(S) URL. Opening the document triggers the outbound submission path without requiring a normal link click.
  • PDF JavaScript shows fake Acrobat updater prompt high PDF_FAKE_ACROBAT_UPDATE_LURE
    PDF JavaScript displays Acrobat/update-themed language such as a document rendering engine update or remote connection to Adobe servers. When paired with JavaScript or external submission, this is a social-engineering lure rather than benign document text.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://ftp.phishing.guru/XSzBVM1JHVXZUbmxzY213eVJESXlSaXRwV1hSdU9Ha3lURkU1VWtFeVJtaHhVRkl2TmpSd2VDdGhUMGRGVG04eE1ETlNWM292VTA1bll6VkxhRVJYTURWalZYZENRVEl5WjFNeWRrVlpWMGhwUVVweFZUVTVTVXRSWm1KUlZqQnBNSFZSZFZadE5GWTFlV005TFMxTlFrRkhhWGhMYzA1bFRHOVlhV2xSUzBKTFRHbG5QVDA9LS04ZTc0ZjdlNWZiODM5MTIxYjBhZmI5MTgwYjA3NWZiZGFhNzZlNTYw?cid=895975196#FDF
    • https://ftp.phishing.guru/XVkdRd01YcHNiVEpDWm5WQlpWbEpWbFpSZVVoR0syMVJOR3RYUVRWbmJHNUxaa3RFTjNCSU5UaHRaelpFVW5RM2RuRm1ka2czYzNaamExVlFVMDVRWkVZMWJHeGtjRzlZY3k4NFRWWTBTVWcyTjFCRkt6VkVPVEpvYXpWdlJVOVBSMjlRYVdsRGQwZGFTbXRFT1ZwbGRWaGtlbmhYZEVGYVQycFFjRXBDSzBob04xUlJiVkZ0UzB0eWNVRmplbUpaVm1kNk5EWndTV3BzVFdKRk5HdExWbFJ1VURSSVpIcFhXbGcwUFMwdFRVZGpSek5XVjFGQ1N6aEhaR014YjBzeGFrWjJaejA5LS1iNWU1NzkxNzViOWViMGMwMjFiYjViM2Q3NWIzNThjNGI4YmQ0OWM2?cid=895975196
    • https://ftp.phishing.guru/XVFZwT1pXa3lkVmhSY1hoeFV6VlFXV2RWWkVGNU5tVnljSFpVZFhNNGRXOUZiVzF4VkVncmRWSlRXRUl3YW5kcVZESnhVMHRKZGxvM2FHTjJhR0pRYm1ob2FEQm9iRmxsWWt0VFJIZ3phakJ3UjBkbFZXaDJUMHR1ZVdkc1NHVmtZVEF2V0dodGRtRkZjMmxZU2pSNFlrUkZTa05EV1N0T1pWVXpOMVZoV25ZNFMyVTJUUzl0VDNCcmJYQldRWGRYVkV0dEwxZGtkemxTYjNCMFVHNUlUUzg0ZFdVM0wxUklNV00wUFMwdFMxQnhUMVpFUkdSelVIZDZSMVpQUlV4NmVEVnZaejA5LS1hMTcxOWM5OWU5NDg5Y2I0NTgxMzcwZWNlMTI5ODYwOTA3OTIwNDBm?cid=895975196
    • https://ftp.phishing.guru/XT0M5blVVbHFWakV6YlRnelJUazVTRkJxYVRKaGIzZzRla1ZRY0hGMk1GUlJZVzlIYzNWUlRFRllXbWhTTTFkTmFqbFRlSFF6Y2s1TFdHVlFOMEl5UVVWRllXWmxaMnh3VmxJd2JuQTBiSFpzVUV0SU5sSTRPV1V5YldWcWRuTlNNVWhuT1dwQ1RFMWtlamRuVG5jelYxUXhaVU5FTUZReGNYWm1kbGt4WWtWRVJUWnZTalJ6YlVKUFVWUnNXR1J3ZFU5dFN6UTVka3BSYmtsU2VWZDBTRTB6VEdSVE4zQmFaVmRGUFMwdFZGQkhNa2hhTjJsMWNGaDZaMnd6UnpkbFoyOTRaejA5LS04ZGY5OTBiYTlmOWY4MDM5M2YwZTEzNmIxOGVmNzllYjg0MDM4NmJi?cid=895975196
    • 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/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
9bd9632afbbdaa011064b8c4d72ccfa9176b751320700a26b15426c6cf09593e		 pdf-javascript-stream PDF /JS object 12 at offset 0x180A 595 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
javascript_obj0012_001.js
c402d7cd8258c7a0ac3c07eff4e4f8c6bdd5bf2468c553a09f8c9894547cb7b2		 pdf-javascript-stream PDF /JS object 12 at offset 0x1831 103702 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 long base64-like blob(s).
font_00_cff_off0001963b.bin
9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0		 pdf-font-stream PDF embedded font (cff) at offset 0x1963B 4575 bytes

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