Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bfb048c430e7a6…

MALICIOUS

PDF

33.1 KB Created: 2020-06-08 08:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93f5a866e8e9b615f0df565282254b52 SHA-1: 177989441e73990ea1a573946e68e00da5a98fcc SHA-256: f6bfb048c430e7a6f0bc28257f8cb4273808a051b67bf9e6551ea6c11b64efa9
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning tactic to drive traffic to potentially malicious content. The document body contains fragments of text related to '2013 calc bc free response' and the wkhtmltopdf application, which may be part of a lure. No scripts were extracted from this sample.

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://representacoesanttunes.com/uploads/1/3/0/6/130621033/130621033.html#2013+calc+bc+free+response
    • http://41z.undesirable.us/uploads/1/3/1/3/131378796/lolija.pdf
    • http://sysvest.net/uploads/1/3/0/5/130588457/mibaxofeporarusixi.pdf
    • http://ejdesignsbows.com/uploads/1/3/1/0/131070166/dixosis_wuzizo_jojukuxedex_vejuserosemox.pdf
    • http://ns.stciarans.com/uploads/1/3/1/4/131411474/80f3ab3bcf.pdf
    • http://zmchomeschool.com/uploads/1/3/1/8/131856034/silifodiluxuzoniku.pdf
    • http://riverhawkguidedfishing.com/uploads/1/3/0/5/130588518/8149344.pdf
    • http://heysugarmamas.com/uploads/1/3/0/8/130874583/3085985.pdf
    • http://escapekewanee.com/uploads/1/3/1/6/131636845/wemim-ripenivozin-nebelife-gadeku.pdf
    • http://dns1.rubenslamel.com/uploads/1/3/0/7/130738951/duwakadaxilidoluk.pdf
    • http://adsl-64-123-229-202.allenfinancialcorp.com/uploads/1/3/0/5/130551164/4a3c758a36fa32.pdf
    • http://mail.deldelorm.com/uploads/1/3/0/6/130621165/tulidusatowo.pdf
    • http://bestselfonline.com/uploads/1/3/0/5/130551589/2836657.pdf
    • http://cpanel.geraldsandau-sculpture.com/uploads/1/3/0/3/130323237/9292056.pdf
    • https://gimugolek.files.wordpress.com/2020/06/wodumiladipilulokanerisev.pdf
    • https://zedipuxari.files.wordpress.com/2020/06/56163324148.pdf
    • https://midexaviwes.files.wordpress.com/2020/06/nisonulopatesaf.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_off000055d9.bin
6277c766e93a63fd7bf93eb5b345c965ba6a86e17002a52bd89bb30ee2c5d3a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D9 10660 bytes

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