Malicious PDF — malware analysis report

Static analysis result for SHA-256 076396f3289e9452…

MALICIOUS

PDF

41.6 KB Created: 2020-03-08 10:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6ecd3134a9e9e05fa9aa11b99aec8c5a SHA-1: a601cec924bcf72abe9ed803e064412c05aae8e2 SHA-256: 076396f3289e945274b7ad8cf7d9a58d99663134644709e765d0cafffe3cca70
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, many of which point to suspicious domains. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic identified a mass of external links, suggesting a link farm or SEO spam campaign. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://74-123-77-64.mgwnet.com/uploads/1/3/0/4/130488157/130488157.html#lg+ac+remote+control+time+settings
    • http://5foot1ninja.com/uploads/1/3/0/5/130550785/5b063.pdf
    • http://www.andbabymakesthree.co.uk/uploads/1/3/0/6/130603954/2197989.pdf
    • http://mriserhoff.com/uploads/1/3/0/6/130621352/4271434.pdf
    • http://importeddesignz.com/uploads/1/3/0/6/130603937/7532410.pdf
    • http://www.mase.ph/uploads/1/3/0/4/130436402/6c20842f516e.pdf
    • http://www.tilingandstoneservicesnelson.com/uploads/1/3/0/7/130739927/5f6614e6cad040d.pdf
    • http://universitynest.com/uploads/1/3/0/8/130874573/0ad6b20555ff6b.pdf
    • http://yslrecords.com/uploads/1/3/0/8/130814235/gunebovukotufibujuf.pdf
    • http://link-vm.com/uploads/1/3/0/4/130477663/semivosapiwulit.pdf
    • http://www.sacredowlhealing.com/uploads/1/3/0/7/130776409/xebodo_tunif_mumapujikar_zilezinisoxisa.pdf
    • http://portalcoabana.com/uploads/1/3/0/3/130323959/tixez.pdf
    • http://www.americanbeachphoto.com/uploads/1/3/0/5/130543538/2660472.pdf
    • http://pureluxsalon.com/uploads/1/3/0/6/130639916/witekukoget.pdf
    • http://pauleast.net/uploads/1/3/0/4/130483397/8098a2.pdf
    • http://bethstruckhofflicsw.com/uploads/1/3/0/7/130775297/8086146.pdf
    • http://www.hutchautoaccessories.com/uploads/1/3/0/5/130540155/nodoj-divokixipe-rubaj.pdf
    • http://danielscotthunt.com/uploads/1/3/0/5/130550931/pitabosijixizo.pdf
    • http://dramallamaranch.com/uploads/1/3/0/4/130483993/soxosogukeg.pdf
    • http://rebecacportfolio.com/uploads/1/3/0/8/130813483/fezijitu.pdf
    • http://ghoti.shop/uploads/1/3/0/5/130543798/zuworutunurubi_wedubafuwimib.pdf
    • http://mta-sts.mx.touchofgracehealing.org/uploads/1/3/0/5/130589345/gapuparin.pdf
    • http://armorsecurityca.previews.rebel.com/uploads/1/3/0/5/130588872/599ef13.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_off00007a51.bin
8e599842caea63a715ae0ca1e7ece7a9915214933b684242c7e49574c894d913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A51 7776 bytes

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