Malicious PDF — malware analysis report

Static analysis result for SHA-256 c403560225fba6f7…

MALICIOUS

PDF

130.7 KB Created: 2020-03-16 05:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d988617b2ecb308d7ad578952cc3ee7e SHA-1: c2c950bc3410313c62bea9e7e4f3fcde7c77ec34 SHA-256: c403560225fba6f7c2b10b267f6d5291f93778d027a2d6af5a655df118457f4b
94 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and potentially distributing malicious content. The ML classifier strongly flagged this PDF as malicious. The primary lure appears to be a fake annual report, directing users to a URL that hosts another PDF, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://esperanzamassagetherapy.com/uploads/1/3/0/2/130288338/130288338.html#c+r+bard+inc+annual+report+2016
    • http://www.csmx.info/uploads/1/3/0/8/130874046/xejiniga.pdf
    • http://mta-sts.butlercleanersandlaundry.com/uploads/1/3/0/2/130288333/bigezagoti-mijiwovosomug.pdf
    • http://admin.kreativogroup.com/uploads/1/3/0/7/130776747/5281905.pdf
    • http://www.madisontrees.com/uploads/1/3/0/7/130776661/dizudalebegadi_nogijope_zizinujagi_kakew.pdf
    • http://mta-sts.mail.endofnovelty.com/uploads/1/3/0/8/130873961/fabffd4.pdf
    • http://outruntherays.com/uploads/1/3/0/2/130289580/jaxemopufub_fuvolakemulilud_tifelironifew_bevatugobeguw.pdf
    • http://luzernwebsitepreview.com/uploads/1/3/0/9/130970005/gisufaxajo_tomojumurovuliw_merediluxip_tidumigafo.pdf
    • http://www.iboatsmart.com/uploads/1/3/0/3/130379294/jaluzakitene-jotif-zogosifexe-xidoka.pdf
    • http://blueskyrow.com/uploads/1/3/0/8/130873927/86df9c2b.pdf
    • http://ececonline.org/uploads/1/3/0/7/130738636/0dc705ab9b3ff.pdf
    • http://espacodabeleza.org/uploads/1/3/0/6/130620417/5614104.pdf
    • http://odontologiaparapets.com/uploads/1/3/0/4/130435511/zifizi.pdf
    • http://gruuptext.com/uploads/1/3/0/4/130477775/8494cbb1bf8.pdf
    • http://stevecoltrain.com/uploads/1/3/0/7/130739301/zawep.pdf
    • http://brookebabble.com/uploads/1/3/0/3/130379427/a2d94fd4d7.pdf
    • http://www.evahurmportfolio.com/uploads/1/3/0/3/130323806/golobufej.pdf
    • http://pdfconsulting.net/uploads/1/3/0/6/130639076/7037536.pdf
    • http://ayvarosecosmetics.com/uploads/1/3/0/6/130621194/07c12154e87557a.pdf
    • http://aviationhighschool.net/uploads/1/3/0/3/130313049/dibatusumegimo-pabopero-bubomef.pdf
    • http://www.massageredefined.com/uploads/1/3/0/4/130478882/dba292813e.pdf
    • http://www.apexexoticsbengals.com/uploads/1/3/0/3/130312974/0adf1c67ec8b.pdf
    • http://mundellforarizona.com/uploads/1/3/0/8/130815726/totonudebalukideta.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_off0001c783.bin
e98c1890f0c4851ee64ae41e9aed5b75352cc22e8ccb1468c49b76ecb5ea2983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C783 8028 bytes
font_01_sfnt_off0001e69a.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E69A 16036 bytes

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