Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6c9f54d9104b7d…

MALICIOUS

PDF

40.9 KB Created: 2020-03-16 08:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b3c7d6e93d18b5d537ecdf18f840b0de SHA-1: b92f0519267c0752e9f9833b3be04a6758e5cb31 SHA-256: ef6c9f54d9104b7da412e948ad45aaefc7813979c4e8c651bf3ab5cfb020ffc5
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on different domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://www.fearlesssocial.net/uploads/1/3/0/5/130539654/130539654.html#chemistry+limiting+reactant+problems+worksheet+answers
    • http://lamaralexanderforsenate.com/uploads/1/3/0/5/130543093/sonegujeramejivi.pdf
    • http://omgfellowship.com/uploads/1/3/0/5/130588656/tezoginigavo.pdf
    • http://doubledutycleaning.com/uploads/1/3/0/5/130546543/e32808a09b6.pdf
    • http://gbsvirtualassistant.com/uploads/1/3/0/4/130489152/8637190.pdf
    • http://webmail.stichtingskb.nl/uploads/1/3/0/2/130291556/5927013.pdf
    • http://occit.com.au/uploads/1/3/0/7/130776667/diwote.pdf
    • http://hostmaster.lehayet.com/uploads/1/3/0/4/130489025/kamufuvo.pdf
    • http://moonmeart.com/uploads/1/3/0/8/130874065/5089670.pdf
    • http://haolaiwuzaixianyule.f18.ebkf.org/uploads/1/3/0/5/130590457/vulit-lexexuz-zudunawilo-savivisika.pdf
    • http://ooredooqatar.net/uploads/1/3/0/5/130545421/c0018.pdf
    • http://rx4retirement.info/uploads/1/3/0/3/130379902/xapurumel.pdf
    • http://test.wildwaterexpress.com/uploads/1/3/0/5/130539897/zozowogiweriz_molep_wisaka.pdf
    • http://zenessweettreats.com/uploads/1/3/0/8/130814241/405212da63c.pdf
    • http://alphagroupm.com/uploads/1/3/0/5/130588640/1240622.pdf
    • http://twoklassens.com/uploads/1/3/0/4/130435753/0851b34f1ec9536.pdf
    • http://www.pghsportsstore.com/uploads/1/3/0/7/130739286/wegifanob.pdf
    • http://www.ifyourelucky.com/uploads/1/3/0/6/130620736/tivigobapunutezozo.pdf
    • http://sonsofdora.com/uploads/1/3/0/7/130776072/tisikin.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_off00006e26.bin
8cf64bcbeea14421476455597c6efcbf41d07532775222e208949ad6aade59f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E26 7556 bytes
font_01_sfnt_off00008bd7.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD7 2652 bytes

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