Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e91f8b010c65b8f…

MALICIOUS

PDF

43.2 KB Created: 2020-03-09 06:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 25e4d4e929410376fc7bbfd572a10b8c SHA-1: 6c8757330de7180fdf04ebcbe400b1c848ba0f02 SHA-256: 4e91f8b010c65b8fe446b584d8370a1ac833b5a620d130ec4628d22e2c58e2e5
96 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 SEO-optimized PDF hosting sites, a technique commonly used for link farming or to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text related to leadership styles and references the wkhtmltopdf tool, suggesting a lure document.

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://67xq3.salon225.com/uploads/1/3/0/6/130604222/130604222.html#advantages+and+disadvantages+of+participative+leadership+style+pdf
    • http://bedonetmarmaille.com/uploads/1/3/0/6/130605228/63e78c7f.pdf
    • http://thelastminutecelebrant.com.au/uploads/1/3/0/2/130272296/vojesalogorem_xowizizididof.pdf
    • http://burkjackson.com/uploads/1/3/0/2/130289467/9930810.pdf
    • http://jkfosterlaw.com/uploads/1/3/0/8/130874617/8cdd37321e61f6.pdf
    • http://ewth.net/uploads/1/3/0/4/130488812/soposu-begukerujelila.pdf
    • http://shactiro.com/uploads/1/3/0/5/130539340/vadamiso-vekamo.pdf
    • http://newlifedestination.com/uploads/1/3/0/8/130874201/635373.pdf
    • http://www.infullbloomjewelry.com/uploads/1/3/0/5/130542710/suvasorojejoz.pdf
    • http://codypardners.org/uploads/1/3/0/7/130738707/xavediwunavefavimo.pdf
    • http://optimalhospicefoundation.org/uploads/1/3/0/5/130550929/kugonolewiranej.pdf
    • http://www.redstonemarketing.net/uploads/1/3/0/5/130590308/4f99d7355ace5ef.pdf
    • http://spiritjooga.com/uploads/1/3/0/5/130539818/mugavaguloke_tipujeturej_vetulupotusa_jifivurivuwidi.pdf
    • http://crosbieandco.com/uploads/1/3/0/6/130639428/350fa.pdf
    • http://bulletininternationallawyermoves.com/uploads/1/3/0/6/130620801/dekopuba.pdf
    • http://useekufindshop.us/uploads/1/3/0/4/130483804/9336832.pdf
    • http://www.verhuurzuid073.nl/uploads/1/3/0/6/130604938/4814892.pdf
    • http://goldachievement.com/uploads/1/3/0/5/130590357/bebawoj.pdf
    • http://comeatvn.com/uploads/1/3/0/6/130620354/nekofigum.pdf
    • http://qipaiyouxihuangjinchengmianfei.f18.ebkf.org/uploads/1/3/0/7/130740458/kivojuvi_kasiwup.pdf
    • http://performphysiotherapy.net/uploads/1/3/0/5/130539657/3792d46d3c.pdf
    • http://scottspeanuts.com/uploads/1/3/0/6/130604338/zumadukubuwavamoto.pdf
    • http://narrenofnewulm.net/uploads/1/3/0/5/130588627/d791c.pdf
    • http://mjrblogspot.com/uploads/1/3/0/6/130621847/606570abe4f596.pdf
    • http://fredoalvarez.org/uploads/1/3/0/3/130313148/1f4978ad8782c2.pdf
    • http://mjrblogspot.com
    • 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_off00008182.bin
a11a2d072604d89f5317c4f2b66927e840f6f30be62444bdf4e75a2b280f5673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8182 6740 bytes

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