Malicious PDF — malware analysis report

Static analysis result for SHA-256 2439bcc921663190…

MALICIOUS

PDF

40.0 KB Created: 2020-04-02 10:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a59972217a52c751b69d808d67d6be8f SHA-1: caf2212a565f8550dd89123e06d8928e8b872e2d SHA-256: 2439bcc921663190f87d60a3c729f2d7e4b39bac6b1813c3ce0fc8b0a31e2451
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of SEO poisoning or a link farm used to distribute malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the extensive use of external links is the primary attack vector.

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://christianaakingbola.com/uploads/1/3/0/7/130776659/130776659.html#etapa+de+laboriosidad+vs.+inferioridad+de+erikson
    • http://safranproductionservices.com/uploads/1/3/0/2/130271154/foxewulugegipejas.pdf
    • http://facrfoundation.com/uploads/1/3/0/6/130620309/tumewof_nomoxovupilu_pinoxozawutetur.pdf
    • http://hotelsachasmanchester.com/uploads/1/3/0/6/130604476/xixunamesezar-repepagisama-vijaxi-lobiduxipeponu.pdf
    • http://creeksidecommunityfellowship.org/uploads/1/3/0/8/130874283/5529051.pdf
    • http://tamarackmountainguiding.com/uploads/1/3/0/5/130544754/jarum-fowutozinafuk-fabaxafegox.pdf
    • http://miadirectltd.com/uploads/1/3/1/4/131438353/bebomo.pdf
    • http://cnhs.services/uploads/1/3/0/5/130589121/wapixuge-sexilemuxi.pdf
    • http://cosflex.com/uploads/1/3/0/3/130323415/82da99c7aed553.pdf
    • http://denniseasterfineart.com/uploads/1/3/0/9/130969323/safapi.pdf
    • http://wilsontphotography.com/uploads/1/3/1/3/131398066/bijazowabig-gelata-sosokude.pdf
    • http://purelifelvpropertiescom.com/uploads/1/3/0/8/130874543/neputuv.pdf
    • http://gigbags.cn/uploads/1/3/0/9/130969577/2101962.pdf
    • http://leaderschool.be/uploads/1/3/0/6/130639542/wejotikomoroni.pdf
    • http://bel-hairs.com/uploads/1/3/0/7/130775052/zifebututafa-punogovuzires-wonamejajoxo-zebeb.pdf
    • http://swofilmschool.com/uploads/1/3/0/8/130814715/kavekowunobinumavepe.pdf
    • http://droppinhundred.com/uploads/1/3/0/9/130969918/nimasafopeza.pdf
    • http://loletahsvipsalon.com/uploads/1/3/0/7/130775935/dogid-vumufibupizam-nakalexer.pdf
    • http://david-morris.net/uploads/1/3/0/5/130551001/gobipipiv-rivuru-beput.pdf
    • http://hooplajewels.net/uploads/1/3/0/6/130621798/wekuzumixodi.pdf
    • http://naturaphysicaltherapy.com/uploads/1/3/0/7/130739542/wumiv.pdf
    • http://www.qslclasses.com/uploads/1/3/0/6/130604002/8861598.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_off000071b3.bin
72764eca870194677f13ea4d583cff7a3616a76d49e9a7e07812d63c7c0d8acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B3 8408 bytes

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