Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a0b6b8b95180d4…

MALICIOUS

PDF

46.8 KB Created: 2020-03-29 05:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3e139447033f3a61d2cb96415065c9ae SHA-1: 1daa5d1e07b55836d25d07a6c5b60ee41bb2b2fb SHA-256: f8a0b6b8b95180d436d7e30a9266626a3d866d0daaff9524676c32afb538d8cf
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, a technique often used for SEO manipulation or to redirect users to malicious sites. The document body contains garbled text and references to 'Kuta software naming polynomials' and 'wkhtmltopdf', suggesting it is not legitimate content. The primary heuristic identified a link farm with 17 external PDF links, indicating a coordinated effort to distribute links across multiple domains. The embedded URLs are likely part of this link farm, aiming to drive traffic to potentially compromised or malicious websites.

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://richter-family.rominastiebenphotography.com/uploads/1/3/1/1/131163943/131163943.html#kuta+software+naming+polynomials
    • http://www.winstonthomasmd.com/uploads/1/3/0/7/130740524/kasederokopazada.pdf
    • http://aboutyoulifeguidance.com/uploads/1/3/0/4/130483806/vefuwubul.pdf
    • http://scottiesrottiesofwny.com/uploads/1/3/0/6/130621216/5159317.pdf
    • http://www.creekgoons.com/uploads/1/3/0/6/130621973/1863345.pdf
    • http://thejackquest.com/uploads/1/3/0/6/130621928/dasudug_wifepejaz.pdf
    • http://churchofchrist-petersburgva.org/uploads/1/3/0/4/130492441/wepuseparugawuna.pdf
    • http://www.matgskinner.com/uploads/1/3/0/6/130640095/5263299.pdf
    • http://andrewsaver.com/uploads/1/3/0/7/130775560/82a39.pdf
    • http://networkingpeopleconsulting.com/uploads/1/3/0/6/130620642/dosebugudig_detemitazotoli.pdf
    • http://infrarxservices.com/uploads/1/3/0/7/130776801/0904c4ba35b64b.pdf
    • http://firlesgaming.club/uploads/1/3/0/5/130588210/25d2043965.pdf
    • http://amandapetersenfails.com/uploads/1/3/0/4/130483114/a42baf455.pdf
    • http://psolmusic.com/uploads/1/3/0/9/130969706/be1b69e06158d4.pdf
    • http://stephenjmcmanus.com/uploads/1/3/0/7/130739498/kulozevepol.pdf
    • http://cpcalendars.wact.org/uploads/1/3/0/6/130604557/fecda082c79.pdf
    • http://hoveniersbedrijfdebuitenhof.nl/uploads/1/3/0/7/130739584/bimevijajikokobuz.pdf
    • http://983.bpmtc.com/uploads/1/3/0/3/130313150/bekonotiwififo_satenomukazipa_zikib.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_off00008ac8.bin
af76e526fbd4e5e96984f8be8760b29d054a951dcb49737d591db5ba962ebbd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC8 9176 bytes

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