Malicious PDF — malware analysis report

Static analysis result for SHA-256 946a31a09ccdea04…

MALICIOUS

PDF

49.1 KB Created: 2020-06-06 21:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a358275ae81bb5852d2824590e97e458 SHA-1: 189e4128e9b5a2fbc240e73aab706c1a318664ed SHA-256: 946a31a09ccdea04e21120f4ffd344ae476f339fccced3c7c659768d19ce6090
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, as detected by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though heavily obfuscated, also contains URLs pointing to external resources. These links are likely part of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious content or to manipulate search engine rankings. 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://webdisk.justanothersunday.com/uploads/1/3/1/3/131381712/131381712.html#elips+te%25C4%259Fet+denklemi
    • http://mail.opelle.com/uploads/1/3/1/6/131637679/pudipekupujiniw.pdf
    • http://kariespin.com/uploads/1/3/0/4/130436258/kavixixifexuz.pdf
    • http://publicsafetyservices.net/uploads/1/3/0/8/130874426/b0721938cf.pdf
    • http://firewall.stfrancisxavierschool.org/uploads/1/3/1/3/131398356/8585dc.pdf
    • http://godeco.fr/uploads/1/3/0/6/130604793/6492184.pdf
    • http://alxconstruction.net/uploads/1/3/0/4/130435905/tisotigozepaxulaw.pdf
    • http://lumenlux.info/uploads/1/3/0/5/130590475/11f548d3.pdf
    • http://rpierpont.com/uploads/1/3/1/1/131164506/8564225.pdf
    • https://gopetimumes.files.wordpress.com/2020/06/sakodoj.pdf
    • https://toxebep.files.wordpress.com/2020/06/vunozelagero.pdf
    • https://zaxidelodawa.files.wordpress.com/2020/06/34990299696.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007356.bin
6bb4c2d0e10ccfc67027bc38c591c0112d739d6a808cb0966f5147b9a64ba40c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7356 15524 bytes
font_01_sfnt_off0000a238.bin
c3712708bccb53f1216bdad53ca795e775c2b29b2b1f043c0fc7baa1c2ddca9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA238 16180 bytes

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