Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efb2175d2246781…

MALICIOUS

PDF

31.9 KB Created: 2020-05-24 07:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77c896b7d56241004a919eea3cd5fdfe SHA-1: db278bd80cec704a56a4bb6616f5f29982666b7a SHA-256: 8efb2175d2246781de49d29def459304fdf300dba918c95cca745f608ad92cc5
62 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links pointing to various domains, identified by the PDF_SEO_LINK_FARM heuristic. These links likely serve to redirect users to malicious content or to manipulate search engine results. No scripts were extracted from this sample, limiting the ability to determine a specific payload delivery mechanism beyond the link farm.

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://100kchallenge.stefanaarnio.com/uploads/1/3/0/7/130739839/130739839.html#the+very+hungry+caterpillar+free+dow
    • http://mdmas.org/uploads/1/3/0/6/130621165/0ea90.pdf
    • http://3bz.undesirable.us/uploads/1/3/0/4/130488087/d07de.pdf
    • http://74-123-72-137.mgwnet.com/uploads/1/3/0/9/130969139/b79a7a72d6f1e.pdf
    • http://syxgraphyx.com/uploads/1/3/1/3/131384362/3177525.pdf
    • http://admin.sapphiredream.net/uploads/1/3/0/7/130775883/84dc16c0a1.pdf
    • http://ragamuffindesignco.com/uploads/1/3/0/3/130313324/nilupogarom-pedujelikokef-juforusitilepaz-lodesit.pdf
    • http://arrowitconsulting.com/uploads/1/3/0/6/130605198/tegor.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_off00004e3f.bin
7bc73dab525caa2ec4de6d04b8a97976f074a15514fccb2b8c8af7414621144d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E3F 10944 bytes

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