Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88568112d7f5179…

MALICIOUS

PDF

41.8 KB Created: 2020-03-29 10:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5336a807d6e4aa98f8932412dbd13606 SHA-1: 4c3a3bdcfafaee544a2efa28c69d1545903d9cca SHA-256: c88568112d7f51793dc9c56245efe4b77ad3206cae676ad2d161fed4a12bc38a
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on different domains. This behavior is indicative of a link farm or SEO poisoning attack, designed to drive traffic to a network of sites. The document body itself contains garbled text and what appears to be metadata, but the primary malicious intent is derived from the extensive list of external URLs.

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://nuohotel-zh.devsite-1.com/uploads/1/3/0/5/130550985/130550985.html#como+hacer+un+folleto+paso+paso+como+se+hace+un+folleto+a+mano
    • http://rootedcapitalmanagementgroup.com/uploads/1/3/0/2/130272511/4086787.pdf
    • http://covetlash.com/uploads/1/3/0/7/130776223/tamatadapuzovojopo.pdf
    • http://aegohealth.com/uploads/1/3/0/6/130620380/4544131.pdf
    • http://www.lebowitz.org/uploads/1/3/0/4/130476736/4641692.pdf
    • http://sacredcrystalhealers.com/uploads/1/3/0/7/130775889/11f7085f0f9.pdf
    • http://thechrischapman.com/uploads/1/3/0/8/130813783/3761128.pdf
    • http://www.dtmgt.com/uploads/1/3/0/6/130603741/90fe0b.pdf
    • http://cookiedoughmagiccatering.com/uploads/1/3/0/5/130546391/lisobe.pdf
    • http://elinetlouicius.com/uploads/1/3/0/3/130323417/tonimapejoz-dokukerowuvib.pdf
    • http://ginasscrubs.com/uploads/1/3/0/3/130313649/90130.pdf
    • http://kimbelliaboutique.com/uploads/1/3/1/0/131071047/tisobi_mozanuriwon.pdf
    • http://reaidlab.com/uploads/1/3/0/5/130540046/416174.pdf
    • http://mommylovesandrew.com/uploads/1/3/1/4/131409170/6ce69b2cc6d16d.pdf
    • http://carrecoverylondon.org/uploads/1/3/0/2/130270746/xomiborifewu_rajemi_xifugofo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eff.bin
96f1fdf0bb662dc4c1ffde56aea5c5c280ab0717cb6787fca46ed4ea7552c622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFF 8384 bytes
font_01_sfnt_off00008df4.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF4 2616 bytes

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