Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a4e6d5e3f83aab…

MALICIOUS

PDF

30.2 KB Created: 2020-05-14 03:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a983c32ec2f7e8185cc5a52820ec9b80 SHA-1: 2c44bdf580a2fbe41f5e6c746640656b065d22fe SHA-256: e8a4e6d5e3f83aab5fa73b7cc9096f60c08590250974ec80d2523948ff1b7fac
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous external links, many of which are structured as SEO-optimized URLs pointing to potentially malicious content. The document body mentions 'Software update android 7.0', suggesting a lure to trick users into clicking these links. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://fortkortlaw.com/uploads/1/3/0/8/130813447/130813447.html#software+update+android+7.+0
    • http://resurrectionspirits.com/uploads/1/3/0/2/130270768/dikisekileviz-ruvabogewe-duzenurilid-kazunukibejoder.pdf
    • http://thediamonddivaboutique.com/uploads/1/3/0/7/130738940/3147403.pdf
    • http://metrointegrativesupplements.com/uploads/1/3/1/4/131407051/9679400.pdf
    • http://crystalgiftz.com/uploads/1/3/0/4/130476200/9434439.pdf
    • http://bestsharkshirts.com/uploads/1/3/0/5/130590463/tabiginobatidumog.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_off00004e8e.bin
a6a9d022d31e671f0dab898124384ae554df36ebc889ca6b8a70d5fd095fecde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E8E 9268 bytes

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