Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d1f06821b60f0b…

MALICIOUS

PDF

71.2 KB Created: 2020-03-10 02:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 14e2040e97e0c42f9a1cbf56a0b643c1 SHA-1: 1793dc09abf13e052601d558f6eb9d1b73d06852 SHA-256: 01d1f06821b60f0bbecb7d786365848fc889c5157cba1fd7e4cdaf7e206484b1
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO link farming or to distribute malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm. While no scripts were directly extracted, the nature of the embedded links suggests a potential for further malicious activity or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://x0169003xstreamtravel.xsideas.com/uploads/1/3/0/7/130775398/130775398.html#inverse+trig+function+derivatives+pdf
    • http://centralflpc.com/uploads/1/3/0/6/130621785/jerefibiwajo.pdf
    • http://learnityourway.com/uploads/1/3/0/8/130814923/wataluvusupal-wonekewisobuzo.pdf
    • http://www.maison-ancestrale-beloeil.com/uploads/1/3/0/5/130539215/6864786.pdf
    • http://whiskeyriverweddings.com/uploads/1/3/0/3/130313190/xuxobit_wujuzawozamir_puvokekivojow_ferexexukujiw.pdf
    • http://titlejava.com/uploads/1/3/0/8/130814855/65209d8.pdf
    • http://paypalbonus.com/uploads/1/3/0/7/130775023/6729981.pdf
    • http://readthinkwritespeak.com/uploads/1/3/0/3/130379462/bexiwomig.pdf
    • http://akrewards.com/uploads/1/3/0/3/130313170/difedoriru.pdf
    • http://pinestschool.com/uploads/1/3/0/5/130588984/8405866.pdf
    • http://www2.biba.com/uploads/1/3/0/4/130488470/nedorotatuwa_waradigesovoni_gekegini.pdf
    • http://vintagevancouvan.com/uploads/1/3/0/7/130739396/sofidato-dixuziri.pdf
    • http://pitkulup.net/uploads/1/3/0/6/130604185/wazozuvuvekuk.pdf
    • http://denverbikeblog.com/uploads/1/3/0/8/130814346/nilibulakamura.pdf
    • http://techgearcases.com/uploads/1/3/0/8/130813136/f60e5571c2.pdf
    • http://whatabrowants.com/uploads/1/3/0/3/130313157/706e9.pdf
    • http://visitnewberryfl.com/uploads/1/3/0/4/130436172/ligikoremoxiv.pdf
    • http://midwestmusclebullyclub.com/uploads/1/3/0/6/130621818/benojoregum_bozegufavevakiw.pdf
    • http://solskib.net/uploads/1/3/0/6/130621998/2534322.pdf
    • http://hillsdaledrama.com/uploads/1/3/0/9/130969402/1044265.pdf
    • http://meredithbirrell.com/uploads/1/3/0/5/130545333/ruwolije_natizejomizifem.pdf
    • http://www.kojitsudo-hari.work/uploads/1/3/0/8/130874067/bamuwevode.pdf
    • http://shopaspectsquad.com/uploads/1/3/0/6/130621947/1110655.pdf
    • http://www.connectorjpa.com/uploads/1/3/0/5/130551423/pesekafebuleloz.pdf
    • http://thegem.studio/uploads/1/3/0/5/130542870/gidinasajuw-selalapubad.pdf
    • http://easttnfedprogconf.org/uploads/1/3/0/8/130874124/xazoti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c844.bin
2deaf91924ee42ae02b239c1016448110a9fcbf2c35413c7a3e51989cd171d8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC844 9096 bytes
font_01_sfnt_off0000eb05.bin
d4ecdfc526ecc70e6b9687a66eb6711ebcc5ac333a68e4ea13b47914ef5c5f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 3208 bytes
font_02_sfnt_off0000f668.bin
40fdf336eeb227fd3d4f1c6b8646464e553c1cc8ca3cc11276820c2e6a2585fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF668 16176 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.