Malicious PDF — malware analysis report

Static analysis result for SHA-256 78345374e4af9311…

MALICIOUS

PDF

42.4 KB Created: 2020-03-13 12:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2bda1fcd278e8065dd570e1026c04c0d SHA-1: 13eaa08a1d51980276dfa7993107a434d5b5e329 SHA-256: 78345374e4af931133fe339d649ce4c0fc1ee61112ab05af42de7f318ca668aa
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a deceptive purpose such as SEO manipulation or hosting malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm heuristic indicate a high likelihood of the document attempting to redirect users to malicious sites.

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://mindfulofjiujitsu.com/uploads/1/3/0/5/130590416/130590416.html#pr%C3%A9-ecl%C3%A2mpsia+ecl%C3%A2mpsia+e+s%C3%ADndrome+de+hellp+pdf
    • http://mail.theharpermethod.com/uploads/1/3/0/7/130775545/muviranovaridoz-zibivewepa-juweguvaj.pdf
    • http://topfinesserapparel.com/uploads/1/3/0/5/130551182/2348131.pdf
    • http://philippemora.net/uploads/1/3/0/2/130288629/zunezowewuzas-nimorejof-dagik-zewafebuxivo.pdf
    • http://bunnystravel.com/uploads/1/3/0/6/130604195/9614633.pdf
    • http://kunalsen.org.uk/uploads/1/3/0/4/130488316/sawebakaxes-pamabuwobuf.pdf
    • http://www.toptreasuresboutique.com/uploads/1/3/0/9/130969944/gitogasezajixonaxo.pdf
    • http://www.mailbox.olddaysnewways.com/uploads/1/3/0/4/130435524/f08836764d44c2.pdf
    • http://bmyguestnow.com/uploads/1/3/0/6/130604136/4800580.pdf
    • http://mycodrysolutions.com/uploads/1/3/0/6/130620959/721517.pdf
    • http://exsequorconsultancy.com/uploads/1/3/0/6/130604010/21bbf2.pdf
    • http://sedcorp.net/uploads/1/3/0/2/130272478/828992.pdf
    • http://nickmitchellmusic.net/uploads/1/3/0/6/130621484/5e79a361b6d438.pdf
    • http://bailey.queenanneelementary.com/uploads/1/3/0/5/130539408/zijumemisegoti.pdf
    • http://polska.euromission.org/uploads/1/3/0/4/130435581/13132d3853ed589.pdf
    • http://www.ifthebookfits.blog/uploads/1/3/0/7/130775365/8452965.pdf
    • http://www.hoppinaroundhollands.com/uploads/1/3/0/2/130291585/9595791.pdf
    • http://www.fromcindyseasel.com/uploads/1/3/0/2/130289655/wivamufega_sojififezuxa.pdf
    • http://oneshieldfinancial.com/uploads/1/3/0/5/130551137/mogubaruje-dolomon-lajirerevupifos.pdf
    • http://www.bluedolphinphuket.com/uploads/1/3/0/4/130475925/mesimafa.pdf
    • http://basismarkt.com/uploads/1/3/0/6/130604574/5506648.pdf
    • http://normandyoptical.biz/uploads/1/3/0/5/130539085/fimapodugoluk_nivaruvetobizuj_fipifavonoma_pomaf.pdf
    • http://shopwinehk.com/uploads/1/3/0/7/130776225/wenozalatip.pdf
    • http://lightoftorahpilgrimage.com/uploads/1/3/0/7/130775046/masez.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_off000075a7.bin
b5adce826c80264e5b7a787c2373fa1f81c245100097fa073baf8e607ae12600		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A7 11268 bytes

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