Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e5bdc92188d764…

MALICIOUS

PDF

44.9 KB Created: 2020-03-28 14:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c04f07be29c3c2cc71dfeaf2a8995cbd SHA-1: 41b9020b25e76f75b3215acb2b890223c75388c9 SHA-256: 53e5bdc92188d7644f56be55f1315afaaf9e124bf7c4f707a032d174f9065257
92 Risk Score

Malware Insights

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

The PDF document contains a mass of external links to other PDF files hosted across numerous domains, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. The document body text is largely unreadable due to encoding issues, but the presence of the URL 'http://beyondhillco.com/uploads/1/3/0/6/130604397/130604397.html#cuales+son+los+elementos+verbales+de+la+comunicacion+oral' suggests a potential lure related to communication elements.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://beyondhillco.com/uploads/1/3/0/6/130604397/130604397.html#cuales+son+los+elementos+verbales+de+la+comunicacion+oral
    • http://mail.jonascain.com/uploads/1/3/0/7/130775220/wunizaxojet-vilar-jafuf-dixomux.pdf
    • http://pathproduct.com/uploads/1/3/0/5/130538817/tetevaxidif_sugudiz_pubavuromet.pdf
    • http://nativeitaliano.com/uploads/1/3/0/3/130379504/382df.pdf
    • http://captreefishingboat.com/uploads/1/3/0/7/130776821/1862018.pdf
    • http://virtuouslymeministries.com/uploads/1/3/0/4/130489247/nojasarexit.pdf
    • http://mysteretro.com/uploads/1/3/0/4/130435772/841995.pdf
    • http://duncanskatingclub.net/uploads/1/3/0/7/130774978/xoludapenezub.pdf
    • http://milieugeospatial.com/uploads/1/3/0/6/130605383/ralijalefoj-bitegevum-negoxazuzeripe.pdf
    • http://agapeforum.org/uploads/1/3/0/2/130271011/nizetariv.pdf
    • http://www.fullertonindiansbasketball.com/uploads/1/3/0/5/130546486/nelom.pdf
    • http://pawpartiez.com/uploads/1/3/0/5/130551089/c146997ccd77a4c.pdf
    • http://silviyar.com/uploads/1/3/0/2/130271255/lojanazidugewo.pdf
    • http://donenfeldlaw.com/uploads/1/3/0/4/130492771/bufefirotileke_fotifufoniw_nilexamuvezub_zupadoworosa.pdf
    • http://mayofamilyeyecare.net/uploads/1/3/0/8/130814601/ea6d073.pdf
    • http://northamericancontinent.com/uploads/1/3/0/6/130605159/999826.pdf
    • http://michiganloghomerental.com/uploads/1/3/0/9/130969445/901c7.pdf
    • http://mattbross.biz/uploads/1/3/0/5/130588443/levozil.pdf
    • http://readynetwork-beprepared.com/uploads/1/3/0/4/130435780/2cd13a03.pdf
    • http://finbarrcollinsconstruction.com/uploads/1/3/0/8/130814803/worubagupik.pdf
    • http://www.lettherebedance.com/uploads/1/3/0/7/130775762/9fe257145f2.pdf
    • http://theothermanny.com/uploads/1/3/0/6/130639461/tabag_vojetupi_davigi_jalaximujepijen.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_off00008488.bin
9b7760342ef6b813b0fa784328949b27a2dc8ef5b8da28dd6cac14f46eda1630		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8488 8708 bytes

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