Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff9dd4e3471fb02…

MALICIOUS

PDF

44.1 KB Created: 2020-04-13 12:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 751fe49d04b41d0510c55242dee589a0 SHA-1: bcb828ddae05efefb4a42048ae158425bdc433a9 SHA-256: 9ff9dd4e3471fb0296686bfd5fe069048e7705cde6d8616c2672e6a4ccfc04b3
62 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains a URL that appears to be related to English grammar exercises, which is likely a lure. The primary function of this document appears to be directing users to a network of websites, potentially for SEO spam or to host further malicious content.

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://changeforurlife.com/uploads/1/3/0/6/130621965/130621965.html#perfect+english+grammar+zero+and+first+conditional+exercises
    • http://expound.ca/uploads/1/3/0/8/130813648/2004775b0c7a73f.pdf
    • http://sunitajoseph.net/uploads/1/3/1/1/131164136/377b3f.pdf
    • http://saintgerardfarm.com/uploads/1/3/1/4/131454394/8596499.pdf
    • http://coloredtreasures.com/uploads/1/3/1/3/131398385/2362743.pdf
    • http://mvpoolandspa.com/uploads/1/3/0/2/130291908/sanunigarin-rofolidotid.pdf
    • http://thetaxiucdavis.com/uploads/1/3/0/3/130323727/wepuwiburuk-raxolufoko-sutakutisetatur.pdf
    • http://thom-adv.com/uploads/1/3/0/8/130873842/taliwasiwos-dufubudazexalox-kikuxeliximo.pdf
    • http://drstanzley.com/uploads/1/3/0/4/130493893/dunelobut.pdf
    • http://flavoreffects.com/uploads/1/3/0/4/130435682/negaden.pdf
    • http://queensofburlesque.com/uploads/1/3/0/8/130814858/6da99bcf.pdf
    • http://xpez.com/uploads/1/3/1/3/131398101/ef99f837a64e.pdf
    • http://eastsidemediaproject.com/uploads/1/3/0/5/130541677/somafaginulixenugu.pdf
    • http://taxinetworkgeelong.business/uploads/1/3/0/2/130272616/3311030.pdf
    • http://davesdawgs.net/uploads/1/3/0/7/130739112/kiketepe-zigabisogofu-vavaduxubali.pdf
    • http://krematechlabs.com/uploads/1/3/0/4/130488252/sebarit.pdf
    • http://eastsidemediaproject.com/uploads/1/3/0/5/13054167
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f4a.bin
d867b7a6324cd2091194748393e8eba0fdafac42e0a8544e47269437209cc1cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4A 7724 bytes
font_01_sfnt_off00008d74.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D74 16204 bytes

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