Malicious PDF — malware analysis report

Static analysis result for SHA-256 4152797b0060d11c…

MALICIOUS

PDF

28.8 KB Created: 2020-04-20 02:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 002eb3b3445f2b88fd6cb084319c3687 SHA-1: 3920962c3f071e110caa9b555ba6db6e42eec883 SHA-256: 4152797b0060d11c34eeb03184ef5a72ba0ad16ab7187a7ebb0f0696f2d4d5a5
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to various domains, many of which appear to be part of a link farm. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are likely used to redirect users to malicious content or facilitate ad fraud. No scripts were extracted from this sample.

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://lesehanker.com/uploads/1/3/0/6/130604476/130604476.html#ben+10+cartoon+network+in+tamil
    • http://wowwowholycow.com/uploads/1/3/0/5/130551247/761a53fa854ec5.pdf
    • http://nobraclubusa.com/uploads/1/3/0/6/130604487/ffc9c3f16084.pdf
    • http://vrchotalifestyle.com/uploads/1/3/0/5/130547846/5939050.pdf
    • http://violetohara.com/uploads/1/3/0/3/130313553/xewiveti_vidikifimuke_xosaxudodososal.pdf
    • http://risenshinewindowcleaning.com/uploads/1/3/1/3/131379789/6e53d.pdf
    • http://thescarletgardens.com/uploads/1/3/0/2/130270885/9314949.pdf
    • http://doublebloomcreations.com/uploads/1/3/0/4/130488092/7201770.pdf
    • http://claryzulettephotography.com/uploads/1/3/1/4/131438143/180724.pdf
    • http://gopropaintingservices.com/uploads/1/3/1/1/131164104/zexomenisokunofanas.pdf
    • http://beckysbarsandpotions.com/uploads/1/3/0/7/130776449/9078704.pdf
    • http://bridgewayidsolutions.com/uploads/1/3/0/6/130640079/692beaeffb.pdf
    • http://rakiurahelicopters.com/uploads/1/3/1/3/131379552/9222744.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_off00004a86.bin
1878769bfd9fd112d2362665a3f502ce511336396137a994ec567e9448418eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A86 7116 bytes

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