Malicious PDF — malware analysis report

Static analysis result for SHA-256 81470fcdff449b40…

MALICIOUS

PDF

34.6 KB Created: 2020-05-16 07:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06124fbec376bf14f3cf8e6f2110bdbf SHA-1: 137de55debc47fcc9b8a463f8da02a8523ef1099 SHA-256: 81470fcdff449b40df8e3640b3af773ab308251790bbfbbf033158dee89dc4e6
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on unrelated domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the ability to determine specific payload delivery or execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://owentart.com/uploads/1/3/0/7/130776828/130776828.html#penetration+testing+report+writing+tool
    • http://callthepartygirl.com/uploads/1/3/0/4/130478433/rolifawomove-megagujawijif-tewikufad-fogigi.pdf
    • http://maeganprovan.com/uploads/1/3/1/3/131384333/dajid.pdf
    • http://chopyourownwood.com/uploads/1/3/0/5/130540033/f780b6996eee2aa.pdf
    • http://graysonmichaelbeats.com/uploads/1/3/0/5/130590700/radekezo_pinuduzume.pdf
    • http://arizonasheritagehorse.org/uploads/1/3/1/3/131384432/666e94a2283.pdf
    • http://teamredangus.com/uploads/1/3/1/0/131070078/diwivegufig-lenagatizadav.pdf
    • http://pets4life.blog/uploads/1/3/0/6/130620843/jotabelamir.pdf
    • http://larkinsinvestigations.net/uploads/1/3/0/6/130620584/vativuduv_nepukizebexusem.pdf
    • http://skindeepbeautyestheticsbycyndi.com/uploads/1/3/1/4/131437476/b7a905.pdf
    • http://classicevaluators-usa.com/uploads/1/3/1/3/131398350/0367593cb.pdf
    • http://mammothspringsoap.com/uploads/1/3/0/4/130476368/sazaba_tazogido_fuzixiwigolo_wupuximajok.pdf
    • http://mangoxan.com/uploads/1/3/1/1/131164549/8619997.pdf
    • http://kavelastours.net/uploads/1/3/1/4/131437984/falujofipejuxi_barutitinaz.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_off00005c30.bin
8c0ec09d0d040eb6a041ca2a69f63c3ad46a2d6873d48ee0c69b67b5fccc2cd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C30 10172 bytes

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