Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d4e2944e206f0c…

MALICIOUS

PDF

42.1 KB Created: 2020-03-21 16:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a18144d7e5f6e5a47b7b4530aa64b210 SHA-1: daf880e3b2ce17a0e091a73355936ccbc5ea307a SHA-256: 37d4e2944e206f0c30cdcbf8bc7fcf45f8f6b7395b8cd412f5b461288f23105c
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDFs hosted on various domains, a technique often used for SEO manipulation or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The document body contains garbled text and what appears to be metadata, but the primary malicious activity is inferred from the extensive link farm.

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://pranzotruck.com/uploads/1/3/0/3/130379770/130379770.html#5+micromolar+to+mg%2Fml
    • http://www.maxcopluscorp.com/uploads/1/3/1/1/131164054/369e209ed154.pdf
    • http://rem5vrlab.com/uploads/1/3/0/6/130620436/daaa33d22eabc4.pdf
    • http://myfiltershop.com/uploads/1/3/0/8/130814601/022baa422a32.pdf
    • http://aguasabiertascr.com/uploads/1/3/0/7/130775628/xipitemokanelo.pdf
    • http://adeptwebsolutions.com.au/uploads/1/3/0/5/130551262/dimoxuma_begug_zifuwunogizinu.pdf
    • http://heidiwoelfle.com/uploads/1/3/0/8/130813557/ae78c4a88ad0a.pdf
    • http://www.lokada.lt/uploads/1/3/0/6/130621451/didefamubop.pdf
    • http://mdlawschaumburg.com/uploads/1/3/0/5/130552017/8123200.pdf
    • http://chinainvestco.com/uploads/1/3/0/5/130590672/muxemexesolabutuz.pdf
    • http://www.midwesthappiness.com/uploads/1/3/0/3/130379362/e8afdf00995.pdf
    • http://paintintothenite.com/uploads/1/3/0/4/130483400/5002f.pdf
    • http://johnhdouglass.com/uploads/1/3/0/4/130483412/5c81338ee.pdf
    • http://littleriverwoodshop.com/uploads/1/3/0/2/130288589/domogevek.pdf
    • http://mjhtraining.net/uploads/1/3/0/6/130603906/5942213.pdf
    • http://wildberberis.com/uploads/1/3/0/5/130551001/716395.pdf
    • http://atlantasownpw.com/uploads/1/3/0/6/130604733/bf526fc.pdf
    • http://cookiecorner.org/uploads/1/3/0/8/130814993/zebiliwujosa.pdf
    • http://www.mathematicalresilience.com/uploads/1/3/0/6/130604065/3964303.pdf
    • http://www.mandicars.co.uk/uploads/1/3/0/9/130969427/dezoxopotejumoni.pdf
    • http://mrbcontructionllc.com/uploads/1/3/0/2/130272395/6364605.pdf
    • http://laulimaproduce.com/uploads/1/3/0/6/130605504/dizekinevasaz_mesowaserejavix_mulefebeburegem_gedumiwerana.pdf
    • http://www.arenteprises.com/uploads/1/3/0/6/130621575/6524759.pdf
    • http://sixspadeinc.com/uploads/1/3/0/4/130483520/5515181.pdf
    • http://bloompropertysolutions.com/uploads/1/3/0/6/130639180/lexuki.pdf
    • http://www.mountainsbythesea.com.au/uploads/1/3/0/2/130271095/3661981.pdf
    • http://www.mountainsbythesea.com.a
    • 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_off000072e7.bin
1894d6635ad69f61c6ad3bf12b6160fcf63c5c456f594c68779af152c8204a84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E7 7712 bytes
font_01_sfnt_off0000910c.bin
cf2338b7895a3a873add1db7dfb411390262a2a3d24e5b3dccff59843624ea97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910C 2704 bytes

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