Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dcf2da5ca0ffb4b…

MALICIOUS

PDF

45.2 KB Created: 2020-03-30 11:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 85176e1031458cacc5c07e5a1387c740 SHA-1: 815914fdcb813b70cdd773d7765ea0751e8b186c SHA-256: 5dcf2da5ca0ffb4b9dccf374bfa99dbc3e7fd261158eb18e121b68b5800c8388
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious. The document body text is heavily corrupted, but the presence of numerous external URLs suggests a malicious intent to redirect users to potentially harmful 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://nancywijnants.com/uploads/1/3/0/5/130590412/130590412.html#tipos+de+proporcionalidad+directa+inversa+y+compuesta
    • http://ngemi.net/uploads/1/3/1/1/131164210/e7eb959c5f776.pdf
    • http://psychiaterinwageningen.com/uploads/1/3/0/6/130620454/tuwafugarugunofem.pdf
    • http://britishdesignassociation.org/uploads/1/3/0/7/130775053/50ab628.pdf
    • http://larms-usa.com/uploads/1/3/0/8/130873870/5887896.pdf
    • http://videogamesandmachineguns.com/uploads/1/3/0/7/130775912/kijijisozus.pdf
    • http://futureglobalaerospace.net/uploads/1/3/1/4/131408056/f89039c2a.pdf
    • http://connectingmoments.co.nz/uploads/1/3/0/8/130814758/4124402.pdf
    • http://karenskindredspirit.com/uploads/1/3/0/4/130491271/pizadonugikubal_magikopu_kuzubozej_wikosilop.pdf
    • http://dmit.hk/uploads/1/3/1/4/131437535/7791318.pdf
    • http://finestlandscapingofarizona.com/uploads/1/3/0/7/130739616/1199851.pdf
    • http://theshadow.agency/uploads/1/3/0/6/130622038/4180321.pdf
    • http://beober.com/uploads/1/3/0/4/130488694/xovezumuwidugo.pdf
    • http://iamcarpentry.net/uploads/1/3/0/6/130604320/jofaperadu-derulo.pdf
    • http://theoldvicaragelooe.com/uploads/1/3/0/6/130603807/3475f25a218f0c.pdf
    • http://marianaperezl.com/uploads/1/3/0/8/130874509/wasitajibawab.pdf
    • http://iambrianodonovan.com/uploads/1/3/0/5/130589174/jokozabagarofonevi.pdf
    • http://onebillionrisingatlanta.net/uploads/1/3/0/6/130604860/fuvevavapa.pdf
    • http://guipedia.com/uploads/1/3/0/6/130621673/suverobegeno.pdf
    • http://iqrailc.com/uploads/1/3/1/0/131070226/493948.pdf
    • http://jpagency.org/uploads/1/3/1/1/131164318/lirikuposup_xipixifudon_pigexej_baxaz.pdf
    • http://iplizard.com/uploads/1/3/0/6/130604903/427402ee6.pdf
    • http://nordicactiongroup.com/uploads/1/3/0/7/130776667/razopa.pdf
    • http://schlimmerlaw.com/uploads/1/3/0/7/130740195/e6b1d03b6a935.pdf
    • http://2beu.org/uploads/1/3/0/7/130740092/kaxugesosozuso_tugelil_dapulob_mewowiwakiliw.pdf
    • http://hypnopunctureboston.com/uploads/1/3/1/4/131407995/xutimakapelaze_semomadiv_nitubelakareg.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_off00008596.bin
84518d3ace456218940f0a319b8a7f0b143eabffbe276132e33b9200644c5b3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8596 8636 bytes

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