Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd4eaf9fd8d6fc9…

MALICIOUS

PDF

42.8 KB Created: 2020-03-29 07:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 067e372b998ad562ca81d16679253a72 SHA-1: 1d3c1ebf1943c739c49f8c16d6854b8dfd4dd30a SHA-256: 5fd4eaf9fd8d6fc97f0fb749e0304784c4ac447f3ae498490160408a99d20832
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. The primary URL, http://74-123-76-23.mgwnet.com/uploads/1/3/0/2/130289749/130289749.html#plantronics+savi+w710-m+wireless+headset, appears to be a lure, possibly for phishing or to download a second-stage payload. The ML classifier strongly indicated maliciousness, and the structure suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://74-123-76-23.mgwnet.com/uploads/1/3/0/2/130289749/130289749.html#plantronics+savi+w710-m+wireless+headset
    • http://brbayouth.com/uploads/1/3/0/6/130621353/majusuzudezos-lewagopalal-tukamowe.pdf
    • http://www.dakotaironworks.com/uploads/1/3/0/8/130874130/xitekojaxi.pdf
    • http://northstarmedics.com/uploads/1/3/0/8/130815277/7724427.pdf
    • http://skylerdeckard.com/uploads/1/3/0/6/130604158/1987351.pdf
    • http://renartcapital.com/uploads/1/3/0/7/130738597/potadeluzepax.pdf
    • http://doggiestyles.net/uploads/1/3/0/2/130287808/sofirofigixe.pdf
    • http://dttoughltd.com/uploads/1/3/0/7/130738528/pudurejajuviketi.pdf
    • http://oceanafamilyliteracy.org/uploads/1/3/0/2/130288802/c2d57f9065.pdf
    • http://mta-sts.mx.kansascitydoula.org/uploads/1/3/0/6/130622093/bisubix.pdf
    • http://tryonsquare.com/uploads/1/3/0/8/130874437/noforex.pdf
    • http://hostmaster.q5safaris.com/uploads/1/3/0/6/130604319/fovakovopapudu-jukajuxinumogut-zelewulotunaki-zazowewoxasotof.pdf
    • http://www.josefulgencio.com/uploads/1/3/0/7/130739688/pixitupekobonobox.pdf
    • http://uem-iee.org/uploads/1/3/0/6/130604145/wefer-pabopame-lobidura-xipuzeku.pdf
    • http://midwestcomputerservice.net/uploads/1/3/0/7/130776449/5476271.pdf
    • http://annebdixon.com/uploads/1/3/0/7/130739343/309eaa.pdf
    • http://www.fitby40health.com/uploads/1/3/0/8/130814652/a3936.pdf
    • http://crosleyprofessional.com/uploads/1/3/0/5/130589402/2671430.pdf
    • http://360teamllc.com/uploads/1/3/0/6/130622083/c443917de94.pdf
    • http://originalsoftwaretechinc.com/uploads/1/3/1/1/131163777/wuwuk-wusavaje.pdf
    • http://www.spedtechteacher.com/uploads/1/3/0/3/130312957/6298556.pdf
    • http://farddentistry.com/uploads/1/3/0/2/130288830/18ca572d3d16d.pdf
    • http://rem5mn.com/uploads/1/3/0/5/130546040/95967257f51146a.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_off00007b03.bin
a565d8f811218769bc9f2013be2c12ed81ed5cf63f1465ee799215418f664dfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B03 8588 bytes

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