Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae9ee3146579100…

MALICIOUS

PDF

47.1 KB Created: 2020-04-01 14:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4d472db10be1bf1617320f2072dd1fd6 SHA-1: 9daa791c42fc746c0c09b40f16cb62268cc9af3c SHA-256: 0ae9ee3146579100ee0f13ac3190db1881f59df1d3f40ecac7214b63a8c5df28
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains the title 'Comunicacion entre culturas' and references wkhtmltopdf, suggesting it was generated programmatically. The primary function appears to be directing users to numerous websites, likely for SEO spam or to host further malicious 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://kyflowernseed.com/uploads/1/3/0/4/130436089/130436089.html#comunicacion+entre+culturas
    • http://namelesstea.com/uploads/1/3/0/6/130604321/genekumawarimulobo.pdf
    • http://thesquaredcirclecafe.com/uploads/1/3/0/7/130739445/lukiz.pdf
    • http://pdrfinishcarpentryllc.com/uploads/1/3/0/4/130483230/30279.pdf
    • http://drphen.com/uploads/1/3/0/7/130739285/0420f.pdf
    • http://shazairfan.com/uploads/1/3/0/8/130873996/ce6df23751b.pdf
    • http://wijdstraat.nl/uploads/1/3/0/6/130621932/3046577.pdf
    • http://lorenzettiinformatica.info/uploads/1/3/0/2/130287542/872678.pdf
    • http://apostmodernmind.com/uploads/1/3/0/6/130620869/1592834.pdf
    • http://luxurymattressoutletvermont.com/uploads/1/3/1/3/131379946/8cac567e5e6b.pdf
    • http://landsurveyorsgreybruce.com/uploads/1/3/0/6/130605443/9090496.pdf
    • http://ponilox.com/uploads/1/3/0/5/130541313/nukanekijalur.pdf
    • http://lorettakschmidgallod.com/uploads/1/3/1/4/131437695/7282561.pdf
    • http://afieldsresearch.com/uploads/1/3/0/3/130313632/lufitu_balesegedif_laras_visipagas.pdf
    • http://svenskcbdolja.eu/uploads/1/3/0/7/130775692/nisefivo_wejuraruj.pdf
    • http://floristeriajoanacorts.es/uploads/1/3/1/3/131380344/dasoj.pdf
    • http://oggoel.com/uploads/1/3/0/7/130775719/88c435b392a.pdf
    • http://loneeaglefirearms.com/uploads/1/3/1/1/131163740/2854393.pdf
    • http://clearholistichealth.com/uploads/1/3/0/6/130639854/83e29deb7.pdf
    • http://piedmont-tax-clinic.com/uploads/1/3/0/2/130289236/951fd59.pdf
    • http://easyclicktoearn.com/uploads/1/3/0/9/130969441/kolidox.pdf
    • http://mustafaobeidat.com/uploads/1/3/0/4/130490776/xaxodek-jinazanofeki-nurezox.pdf
    • http://cloudmarketingsystems.com/uploads/1/3/0/2/130272396/51a7e2c387eb86.pdf
    • http://kedjom-ketinguh.ch/uploads/1/3/0/3/130324044/zadewige.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_off00008ace.bin
a4b5fae5fa3d1b6e1a34486f8500008d8a9c6648d4acfb3711221f15cb71fd5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACE 9680 bytes

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