Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce7704a11165af7…

MALICIOUS

PDF

43.2 KB Created: 2020-04-12 20:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: abd701511fe660f63857b22c37c040eb SHA-1: 91374ff057f7f281f9cc3857bccea452b2abdf5e SHA-256: cce7704a11165af7dbbb06207a39236b70ab75421fe5e939bd3275af539e3add
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to various domains, a technique often used for SEO spam or to distribute malicious content. The ML classifier strongly indicated maliciousness. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://darkcrossroads.com/uploads/1/3/0/6/130604562/130604562.html#que+es+costo+beneficio+pdf
    • http://beauwoodworkltd.com/uploads/1/3/0/7/130739852/gatagowabeweraw.pdf
    • http://kslscf.org/uploads/1/3/0/5/130543318/ad6ba68.pdf
    • http://mcleanjesse.com/uploads/1/3/0/8/130874141/megefagep_belogi.pdf
    • http://energeticmotorsports.com/uploads/1/3/0/8/130814643/783a98eba78e.pdf
    • http://christianfamilyblog.com/uploads/1/3/1/3/131379868/rekitikubetawomaxiku.pdf
    • http://pfessorguus.com/uploads/1/3/0/4/130483385/3605058.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_off00007da1.bin
2428bfc85bb53b40f4c36d34461665d83bfebed650488ec77b984ef0b93f1f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA1 9648 bytes

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