Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad34175e3d2bd11…

MALICIOUS

PDF

68.1 KB Created: 2021-04-26 13:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 313babc1d25017886f5282381846e5f6 SHA-1: e5e762e034b13fbe74aff78c35ec9c4b6b2b42d6 SHA-256: 8ad34175e3d2bd11fb26f2146c4f9710d7ed1925e131fb10413bfb8b63301f93
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of many external URIs suggests the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8066

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://vilenefex.ru/strik?utm_term=becoming+rhetorical+free
    • https://reguzuseja.weebly.com/uploads/1/3/2/6/132695615/vumozebug.pdf
    • http://bubble1.space/fort_joy_wellexx7z.pdf
    • http://gazajujana.mygamesonline.org/ansioliticos_2020.pdf
    • https://wukarogokemek.weebly.com/uploads/1/3/0/7/130739107/dufajebezisob_natixar_pakes.pdf
    • https://static.s123-cdn-static.com/uploads/4475588/normal_5fe3db9909a3a.pdf
    • https://kevonixoxudunu.weebly.com/uploads/1/3/0/7/130775897/5152322.pdf
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/faxasitogabu.pdf
    • https://static.s123-cdn-static.com/uploads/4383467/normal_5fecf15a4cc01.pdf
    • https://cdn-cms.f-static.net/uploads/4387054/normal_602f4d51cf98c.pdf
    • http://dirtygirl.fun/man_u_fc_bleacher_reportobicu.pdf
    • https://mowofagafuvu.weebly.com/uploads/1/3/4/5/134594922/tufukev-kudis.pdf
    • https://cdn-cms.f-static.net/uploads/4411918/normal_606e50c0462a9.pdf
    • https://rofizikijomosuj.weebly.com/uploads/1/3/4/0/134012810/ropodekigada_pisetovala_filezurubivafun.pdf
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/dakes.pdf
    • http://securespot.ru/how_to_make_woodworking_joints8769g.pdf
    • https://janodiwuzujemux.weebly.com/uploads/1/3/1/3/131382133/foberunevewufeto.pdf
    • http://walawatomu.mywebcommunity.org/binod_chaudhary_biography_book.pdf
    • http://xemokajoled.medianewsonline.com/vosemef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://revodez.myartsonline.com/canada_immigration_form_download.pdf
    • http://xiniwipilanaju.atwebpages.com/dabedofusepofinosepuvu.pdf
    • http://toxifiv.myartsonline.com/foludezidoxemunax.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010143.bin
668aeac9181d75cad5003a60ae92c8a80f64f05d1bb4fda895b46e4d40235efb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10143 5168 bytes