Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a68627818c76d4…

MALICIOUS

PDF

72.7 KB Created: 2021-09-22 11:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0082ffa60da3bd5e2d3d9a979c3f12ff SHA-1: 7efc2f7a74d65bb41cee8220d1d21fec6f7a9531 SHA-256: d0a68627818c76d485d11233eb629bdc95f9b62b60c06f5cfcc36fff17ac7657
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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 https://irlanc.ru/uplcv?utm_term=escape+sylvester+stallone+2 PDF link annotation
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137bac940d36---48001766582.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/lopunuxom.pdfIn PDF document text
    • https://successalpha.team/upload/files/vubosovagawogonolag.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/32494798883.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/xigubowekasutupotazip.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/dibuweri.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/gegepukuzopisutetumu.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/161497d4f2425f---doted.pdfIn PDF document text
    • http://dogwarts.ru/sites/default/files/file/niwosutafuvoxozed.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/12561934586.pdfIn PDF document text
    • http://skyrybupaslaugos.lt/uploads/files/36241957804.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/sivagapavimin.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/70739538628.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/perolibusikajiwiravuxesap.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/runoroneduzujuwo.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/jirije.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/siwelanop.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/14691485390.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/94045973503.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/gewupegetal.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c28bde64ba---mawonomalajatoko.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6cc86cafd---24760488706.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/dilodudidevimagerel.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/161426cfb70c63---64112695570.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C7 10560 bytes
SHA-256: 81a3c655fb4de9a9f4f3043c858757161a3301c7107da4a1dd71c5526d9f94be
font_01_sfnt_off0000d120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD120 17152 bytes
SHA-256: 7e779141c1d30fc80f464924848b2466923fbd081f39da2d42dc6c3ecbd9e80e
font_02_sfnt_off0000fd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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