Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a5ff4feeaee82d…

MALICIOUS

PDF

37.6 KB Created: 2020-04-11 09:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bee1dc59b59b75abec9176590af5f88e SHA-1: 1b703b87fdef24561e5ecc38384af732a31b0b14 SHA-256: 20a5ff4feeaee82d6b1733c894d5d9875752a0d34c04c6dd837716640499739c
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This pattern is indicative of a link farm or a phishing lure designed to redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://neokundalini.org/uploads/1/3/1/3/131379914/131379914.html#pensamiento+matematico+razonamiento+aritmetico
    • http://po-ka.ca/uploads/1/3/0/4/130476556/xizoduj.pdf
    • http://clovisgrows.com/uploads/1/3/0/7/130776745/fenulif.pdf
    • http://eveninghaha.com/uploads/1/3/0/6/130605194/7326560.pdf
    • http://onenicholasryan.com/uploads/1/3/0/6/130605174/zatoda.pdf
    • http://ucccm.com/uploads/1/3/0/5/130588999/nopatevopofetu_vegitufupuru_faremila.pdf
    • http://tineeandtrendee.com/uploads/1/3/0/7/130739492/2333534.pdf
    • http://undiscoveredactress.com/uploads/1/3/1/3/131380636/lanakajomefana-rebule-mezilavof-jigeruwevuv.pdf
    • http://msbr.ca/uploads/1/3/0/3/130313766/3777963.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_off00006725.bin
404ddcabfcdfb8c80ba2ad7bcdd0a686846701be887641749c6b648f0249ee59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6725 9268 bytes

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