Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe77f6a58582cd1e…

MALICIOUS

PDF

37.9 KB Created: 2020-06-03 14:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97655c53d4394b6deeb9d00999dc4cf6 SHA-1: 521dad197d44a393dd2c4ce796e6fa6ab465b4ff SHA-256: fe77f6a58582cd1ef0057579cb0f7248db686992b5a13d89a1d9d8f1a9a8f26b
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents on different domains. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. The document body contains garbled text and the URLs suggest a link farm or SEO manipulation tactic, potentially used to distribute malware or engage in phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://eeswfl.com/uploads/1/3/0/2/130287279/130287279.html#cripta+antigua+witcher+3+skellige
    • http://buildonthat.com/uploads/1/3/0/7/130775643/3e4b4b25415.pdf
    • http://naaboard.com/uploads/1/3/0/6/130621997/kimezilirunox.pdf
    • http://accuriteprograms.com/uploads/1/3/0/7/130776016/2051640.pdf
    • http://appletonparenteducation.com/uploads/1/3/0/8/130873912/0ec894ae.pdf
    • http://quitosltd.com/uploads/1/3/1/8/131871854/zowupuzefodukasem.pdf
    • http://mail.beckmanappraisals.com/uploads/1/3/0/2/130288383/kovebawawutif_nuxiwepawekose_jubetit_feminalufu.pdf
    • http://yourcareercollaborator.com/uploads/1/3/1/8/131856567/punupekexav-levunopokur-posikekib.pdf
    • http://eeswfl.com/uploads/1/3/0/2/130287279/terms.html
    • http://eeswfl.com/uploads/1/3/0/2/130287279/dmca.html
    • http://eeswfl.com/uploads/1/3/0/2/130287279/policy.html
    • https://zovenix.files.wordpress.com/2020/05/xumuji.pdf
    • https://samenazon.files.wordpress.com/2020/05/vanatuloxegapisasupe.pdf
    • https://wuzinukabev.files.wordpress.com/2020/05/wapuzipejopidesiforo.pdf
    • https://dutilexov.files.wordpress.com/2020/05/13537607061.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c3.bin
7e54455ff1731176c5a8c84bc62f16210806f7dfd95f76e6633fbcbb55c48b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C3 11944 bytes

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