Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1cdfcd1966597fa…

MALICIOUS

PDF

31.4 KB Created: 2020-06-01 15:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e991ec265c773a8fb8531ff4e52ffcb SHA-1: ee5e8521d8e8df6cdebc024fa22e93c8bdc806c9 SHA-256: d1cdfcd1966597fae135e002a27595740827b1706e0ee47f7c5cd815580ea01e
92 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents hosted on different domains. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains URLs that are consistent with the link farm behavior. This suggests a tactic to distribute malicious content or redirect users to phishing sites.

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://40yearsintoa20yearjob.info/uploads/1/3/0/4/130476597/130476597.html#angulos+opuestos+por+el+v%25C3%25A9rtice
    • http://canvasdemitierra.com/uploads/1/3/0/4/130483445/d6bf535bc152.pdf
    • http://mta-sts.mx.naylorsolarlv.com/uploads/1/3/1/3/131380415/zadexuduxamukekexiso.pdf
    • http://willcproductions.net/uploads/1/3/0/6/130621465/421a62cc88432b.pdf
    • http://sheimdal.com/uploads/1/3/0/7/130738903/6096300.pdf
    • http://40yearsintoa20yearjob.info/uploads/1/3/0/4/130476597/terms.html
    • http://40yearsintoa20yearjob.info/uploads/1/3/0/4/130476597/dmca.html
    • http://40yearsintoa20yearjob.info/uploads/1/3/0/4/130476597/policy.html
    • https://buwivimew.files.wordpress.com/2020/05/fokorukeviwulerogarugurut.pdf
    • https://vebujeko.files.wordpress.com/2020/05/88603332209.pdf
    • https://jopawetudame.files.wordpress.com/2020/05/48057458201.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_off00004df4.bin
a3f2559cd344119a4a2261ca43fc1f7daa118182c7e934b1ad1f425e8dc679b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF4 10560 bytes

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