Malicious PDF — malware analysis report

Static analysis result for SHA-256 d054a37957019661…

MALICIOUS

PDF

37.9 KB Created: 2020-04-02 05:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4ce144c9a87928a7129dbb95b8ba6910 SHA-1: 9f12ebd74e06db5f1cd5b778eb2bfb6269f9dbe8 SHA-256: d054a37957019661a66880f445958b7466c6c88231385737f179cd8fe7a765c7
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm designed to manipulate search engine results or redirect users to malicious content. The document body itself is heavily obfuscated, but the presence of the URL http://customhomeelectronics.org/uploads/1/3/0/6/130640059/130640059.html#codigo+de+etica+colegio+de+enfermeras+de+chile and the heuristic PDF_SEO_LINK_FARM strongly suggest this is the primary attack vector.

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://customhomeelectronics.org/uploads/1/3/0/6/130640059/130640059.html#codigo+de+etica+colegio+de+enfermeras+de+chile
    • http://aimeefrancis.net/uploads/1/3/0/6/130620912/4922368.pdf
    • http://landingproperties.com/uploads/1/3/0/5/130550968/a5140bd152d.pdf
    • http://morrislaurenemedia.com/uploads/1/3/0/7/130776206/6565678.pdf
    • http://wildflowerschoolhouse.org/uploads/1/3/0/6/130639683/buvujizugo.pdf
    • http://npmalmo.se/uploads/1/3/0/2/130289229/dolip-lijikijus-sidexuv.pdf
    • http://slowlifedoc.com/uploads/1/3/1/3/131384121/4224721.pdf
    • http://happytimes.media/uploads/1/3/0/5/130539936/jejogoriwarugop-jegowu.pdf
    • http://firstchoiceconstructionservicesllc.com/uploads/1/3/0/3/130323616/f2a379d9f5a2c.pdf
    • http://workinjuryguru.com/uploads/1/3/0/3/130313641/209060.pdf
    • http://murrayparkcondos.com/uploads/1/3/0/7/130739197/171648.pdf
    • http://scottsvalleywrestlingacademey.org/uploads/1/3/0/2/130274378/sebalafevisuziv.pdf
    • http://theacneandskincareclinic.com/uploads/1/3/0/9/130969904/nozalupar.pdf
    • http://synergyspoonflorists.com/uploads/1/3/1/4/131437117/fad18.pdf
    • http://maverickrealtyadvisors.com/uploads/1/3/1/1/131164128/3165795.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_off00006a11.bin
85a25703957aed6128c883724fc51b064f0f0c68e472ad109505996ee3a03fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A11 8344 bytes

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