Malicious PDF — malware analysis report

Static analysis result for SHA-256 0730fc36eba7c23d…

MALICIOUS

PDF

53.9 KB Created: 2020-03-29 06:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2c3b9e869f92f9fff562aca5ce4b14ef SHA-1: e17eca4a9120a69592553db2b1470c7def7db470 SHA-256: 0730fc36eba7c23d30dacd380240f569ff2c8969ad543dfb01730dafcbccbe67
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded links likely serve to direct users to malicious websites or to engage in SEO spam tactics. No scripts were extracted from this sample.

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://ferrotrend.sk/uploads/1/3/0/4/130489539/130489539.html#dnd+5e+artificer+battlesmith+build
    • http://midwesthomebuild.com/uploads/1/3/0/7/130739155/1552328.pdf
    • http://pandatechusa.com/uploads/1/3/0/7/130776728/xilaxetenaf.pdf
    • http://jingcaizuqiuwanfa.f18.ebkf.org/uploads/1/3/0/9/130969990/rapufo.pdf
    • http://74-123-76-212.mgwnet.com/uploads/1/3/0/4/130435590/491992edabe.pdf
    • http://nomadicartist.org/uploads/1/3/0/4/130489377/gapuwurugori.pdf
    • http://mywavs.com/uploads/1/3/0/9/130969726/8645243.pdf
    • http://mindstate.store/uploads/1/3/0/5/130588543/rudasijataneleg.pdf
    • http://estherpianova.com/uploads/1/3/0/4/130493714/454326.pdf
    • http://www.alexsolomon.net/uploads/1/3/0/5/130539279/09d4b52026536.pdf
    • http://www.descansolapaloma.com/uploads/1/3/0/5/130551214/nobiwuxebopagiz_benedeminabiriv_lafepesosozogib.pdf
    • http://soonerliquidations.com/uploads/1/3/0/6/130604126/2644155.pdf
    • http://www.myrelationshipmatters.org/uploads/1/3/0/6/130620767/4439345.pdf
    • http://mail.mikepaganrealty.com/uploads/1/3/0/9/130969510/gonaduvog_fuwokofesuje.pdf
    • http://joaofernandes.org/uploads/1/3/0/7/130740251/xemowesudejunoxalo.pdf
    • http://dustin34h32n2.dustindoiron.com/uploads/1/3/0/6/130604386/19e79.pdf
    • http://mnlc.org/uploads/1/3/0/5/130550769/49589188e.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_off0000a749.bin
5a0546abe855afff7f560da3971c9b683aa8f04ce7c73ebe7bfd16a15469eeac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA749 8588 bytes

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