Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96650fc430651c5…

MALICIOUS

PDF

39.5 KB Created: 2020-03-16 14:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d2fd02ca1bf8b18d9b041330f08912c6 SHA-1: 7086c3f9b576f16b69e41c1be8fcb3ca0b677225 SHA-256: d96650fc430651c54d07225144a5f4ac2986e870e8a9c0f6d2e99b7d3b32959c
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this sample as malicious. The primary attack pattern involves directing users to these external resources.

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://stanfordinnanaheim.devsite-1.com/uploads/1/3/0/7/130775658/130775658.html#10+ejemplos+de+cambios+de+estado+de+agregacion
    • http://808enterprises.net/uploads/1/3/0/2/130287500/jurojerolubape-losile-rusejelib-kaxajepug.pdf
    • http://duoclinica.com/uploads/1/3/0/6/130604283/5521093.pdf
    • http://livingfashions.net/uploads/1/3/0/4/130476586/775a7e9.pdf
    • http://foschia.com/uploads/1/3/0/2/130288802/muvuwupafaziro-mopapakulazubi-zisir-dupapesomi.pdf
    • http://pzhealthysnacks.com/uploads/1/3/0/2/130274166/1a6ff0b3493e.pdf
    • http://www.elrians.com/uploads/1/3/0/7/130739433/c1b01a7fe34.pdf
    • http://hostmaster.jovenesadelante.org/uploads/1/3/0/5/130547552/nubavuzamozaburew.pdf
    • http://www.healthychoicescounselingscottsbluff.com/uploads/1/3/0/4/130488417/buvedunakete-gogesowal.pdf
    • http://petitesilesdefrance.fr/uploads/1/3/0/2/130273752/2651451.pdf
    • http://ryanmecheski.com/uploads/1/3/0/7/130775111/2975368.pdf
    • http://learningdifferencesresourcegroup.org/uploads/1/3/0/4/130435872/levexik-wopetagibu-zenokezinud.pdf
    • http://www.graceagainstthemachine.com/uploads/1/3/0/6/130639147/gavuzakopejon.pdf
    • http://aisupport.co.uk/uploads/1/3/0/8/130814605/2333828.pdf
    • http://eclecticinnatehealing.com/uploads/1/3/0/3/130323124/sadazisefujerijebej.pdf
    • http://groundcontrolgardening.co.uk/uploads/1/3/0/5/130590613/javokokuxopel.pdf
    • http://tiffanyhdesign.com/uploads/1/3/0/6/130621495/tuluziwunux.pdf
    • http://www.dmntdkult.com/uploads/1/3/0/6/130605161/tafipe-ziwuz-lapawaduzexakat.pdf
    • http://www.belamaids.com/uploads/1/3/0/6/130605124/8876141.pdf
    • http://xiyoujiyulechengdailikaihu.f18.ebkf.org/uploads/1/3/0/5/130590111/lugoxoxit.pdf
    • http://myremio.com/uploads/1/3/0/7/130738740/xajexituwexis-binolewaj-miwiratuponopiv-rujixakovebi.pdf
    • http://ns3.becksusedappliances.com/uploads/1/3/0/5/130551235/4592fdc95c9b7.pdf
    • http://marketsimulate.com/uploads/1/3/0/5/130544754/vuxuz_zenonudal.pdf
    • http://ns3.becksusedappliances.com/uploads/1/3/0/5/130551235/4592fdc95c9b7
    • 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_off000070de.bin
cc144f17ea4d193179aac7592d9f46ea57505f35d1774112e06c9cd421deabac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DE 7888 bytes

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