Malicious PDF — malware analysis report

Static analysis result for SHA-256 9944cdbe211d4e7d…

MALICIOUS

PDF

40.6 KB Created: 2020-03-29 07:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c15d207371ae5efc98f10a5da2884acf SHA-1: 71a3e425fd39fc34f046e224bf0ebedb0b102e1d SHA-256: 9944cdbe211d4e7d99649c60aec68b6f052c00626dfab0f38701f5d47aa09474
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files on similar domains. This behavior is indicative of a link farm or SEO poisoning tactic, designed to drive traffic to potentially malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URLs supports this assessment. The document body text, though heavily obfuscated, contains a URL that appears to be the primary lure.

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://supersealusa.com/uploads/1/3/0/6/130621425/130621425.html#excel+max+if+multiple+criteria+with+array
    • http://redandrio.com/uploads/1/3/0/6/130639852/reweme.pdf
    • http://slowventures.net/uploads/1/3/0/2/130273791/1774008.pdf
    • http://mxwdjty.com/uploads/1/3/0/5/130547576/mijananej.pdf
    • http://edmontoncompressionstocking.com/uploads/1/3/0/5/130551654/5834414.pdf
    • http://hungernerve.net/uploads/1/3/0/2/130292089/dumutube-piviren-pevufojaba.pdf
    • http://mta-sts.mx.bcfca.org/uploads/1/3/0/6/130605176/vimut.pdf
    • http://maisondevacances-andalousie.com/uploads/1/3/0/8/130814623/3099118.pdf
    • http://www.botoxroswell.com/uploads/1/3/0/7/130776021/51aede3018e3638.pdf
    • http://zulushuluskidsandfamilyyoga.com/uploads/1/3/0/3/130313741/56b0a3446e86852.pdf
    • http://mandagefoundation.org/uploads/1/3/0/6/130639549/xedatelex.pdf
    • http://joangiffels.com/uploads/1/3/0/3/130323106/sifure-juwipoxax-xewotirutiba.pdf
    • http://andythemechanic.com/uploads/1/3/0/7/130776277/7088030.pdf
    • http://www.denvercoit.com/uploads/1/3/0/7/130776891/midolij_zufusirosi.pdf
    • http://ntellectlaw.com/uploads/1/3/0/7/130775652/wusedawavozevepa.pdf
    • http://amberclements.com/uploads/1/3/0/8/130874163/6fcfd7dd10649.pdf
    • http://comofracasarenlosestadosunidos.com/uploads/1/3/0/2/130287463/kazufijike.pdf
    • http://megjamesillustration.com/uploads/1/3/0/6/130640182/wixibipulizevesit.pdf
    • http://74-123-77-91.mgwnet.com/uploads/1/3/0/7/130739169/42305cb4b8.pdf
    • http://howatt-bio.com/uploads/1/3/0/7/130775853/1290846.pdf
    • http://www.jen-velez.info/uploads/1/3/0/4/130488288/9067568.pdf
    • http://samesexweddingsinfrance.com/uploads/1/3/0/6/130603704/b7aa4f85a00179.pdf
    • http://recutter.com/uploads/1/3/0/7/130739761/kowopomupavi_dojizajuzom_xerusutizef_domepagofe.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_off00007424.bin
1185f9e32f2233d1933fee3684f8387e5fd869bf128b130e26fd0feab1a26831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7424 8388 bytes

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