Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3f79e7da8c0256…

MALICIOUS

PDF

41.0 KB Created: 2020-04-04 05:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 578dc1b0e476372a96839b7f5e4979fc SHA-1: 6209c8d389e0080fd27392f565358a63282a1ffd SHA-256: 1f3f79e7da8c025681e61fd87b64bbfdec6eacd68f4b961f83d724e5c21254f7
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains. This technique is often used for SEO spam or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this malicious intent. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://minnesotahydrographics.com/uploads/1/3/0/6/130620317/130620317.html#manual+de+operaciones+de+cr%C3%A9dito+p%C3%BAblico
    • http://sydneycustomtiling.com/uploads/1/3/1/1/131163599/dulegokinalepunawebi.pdf
    • http://cancunstanduppaddle.com/uploads/1/3/1/4/131407668/3fcb533.pdf
    • http://lancestralcafe.com/uploads/1/3/0/8/130813325/mexaja-gonesu-momarez.pdf
    • http://starlettsboutiqueplus.com/uploads/1/3/0/5/130551019/sogeroxif-kasiwej.pdf
    • http://triunesolution.net/uploads/1/3/0/4/130435638/rolofawujemixumoli.pdf
    • http://leinsterlandscaping.com/uploads/1/3/1/4/131453049/9686552.pdf
    • http://amtecfishing.com/uploads/1/3/0/6/130621310/1425889.pdf
    • http://jerryovadia.com/uploads/1/3/0/3/130379070/2728319.pdf
    • http://bow-train.com/uploads/1/3/0/6/130620893/fikiro.pdf
    • http://sacatout.com/uploads/1/3/0/6/130621880/mavojik.pdf
    • http://lazyoxfarmhemp.com/uploads/1/3/1/3/131379021/3987706.pdf
    • http://lensleydesign.com/uploads/1/3/0/5/130590658/titosikew.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_off0000732a.bin
b51ba25f9e1f1889513acd2435e57bb921dd5e203cc7e893747394e49ec4d41e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732A 9264 bytes

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