Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cad056485e3fabc…

MALICIOUS

PDF

35.8 KB Created: 2020-04-07 03:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b29e4d373d1b392956bba082afad3b5f SHA-1: a4ec5e4d6cf4a0734dbf6ed93301c2c941b31663 SHA-256: 3cad056485e3fabc7953c89e540c989f239f1e3bfa9ca98a2a30fdbeb4664e90
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of SEO manipulation or a link farm designed to distribute malicious content or traffic. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the ability to determine a specific payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://bdlecobuild.com/uploads/1/3/0/9/130969678/130969678.html#what+is+coordinate+system+linear+algebra
    • http://hallesdaughterfashionandaccessories.com/uploads/1/3/0/7/130739026/2857538.pdf
    • http://haleyhoch.com/uploads/1/3/0/9/130969054/vikatisoto_zavifurapigute_nifiwam.pdf
    • http://happipoki.com/uploads/1/3/0/6/130605515/6854413.pdf
    • http://adrollonshows.com/uploads/1/3/0/3/130379135/37f9f6a0.pdf
    • http://friendsofnazareth.net/uploads/1/3/0/4/130435729/7570508.pdf
    • http://dbfamilytrust.com/uploads/1/3/0/6/130605447/govibisojejuradewilo.pdf
    • http://gearfitnessabq.com/uploads/1/3/0/6/130621903/mupexabinanamaf.pdf
    • http://xtragoldbeauty.com/uploads/1/3/0/7/130776225/191cf669c1d.pdf
    • http://reafpropertygroup.com/uploads/1/3/0/5/130550973/84ad8.pdf
    • http://superscoreme.com/uploads/1/3/0/5/130551006/zofud_xagavaweda_xilugixoravop.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_off00006369.bin
a51aebe1f3b7add7e5304bd557a2b426ddc72ab40e344d8efa5c0650cf00f768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 7884 bytes

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