Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96ee05f721468e9…

MALICIOUS

PDF

84.6 KB Created: 2021-06-30 13:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2c31537eccf9344df2493ded8170c148 SHA-1: 5ab0496c83fa68bf94f31331ab3d95848e64ed59 SHA-256: d96ee05f721468e990960273dc5f499b0f1ceeaf04f0bbc94fcdbc17542509bd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV. It contains numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic to obscure the true destination or leverage compromised infrastructure. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3800

Heuristics 5

  • 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
  • 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://coretry.ru/uplcv?utm_term=best+way+to+cook+a+spatchcock+chicken PDF link annotation
    • https://pepinieramontana.ro/ckfinder/userfiles/files/9033172853.pdfIn PDF document text
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/40332088597.pdfIn PDF document text
    • https://actor-conseil.com/files/file/96741380462.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/werexelofedu.pdfIn PDF document text
    • https://grancom.by/upload/docs/48722521156.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/38386289387.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/1bfc197f09e2e08796fb8f29614b058c/54958732321.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080237e86e51---12237884205.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c80806d0e5---58414589547.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/5729437613.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/f124f39afedb9fa383ea643ec36e50b8/sevofexometuvigamukuxad.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9d05e214d---71770817555.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/48356385085.pdfIn PDF document text
    • https://iwistw.com/upload/files/91009338102.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891265e404b---topalowaz.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c77265bd4---sokufavokewepefoto.pdfIn PDF document text
    • http://everettsbarbque.com/clients/b/b0/b0b566c85bab127526a414587b81487f/File/95135074816.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/jiwefovevugadanazeg.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/n60ted5ba8khokhrdkd2qgh62m/46072540342.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/v7lfht8dmmbn8poidlk0o4u1b2/98900589979.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/04e56487d76a445bd73e310336be5191/wogevavuguxibudarorawo.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076b5cfdce75---motunopelowiketagekexiwo.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/9809516177.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/46uh7i1l0fsdc81gjvrnpksnue/jubofonatuvaposisid.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608369c59e9a3---dipinevoroposapadoxurow.pdfIn 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_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001131d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131D 10672 bytes
SHA-256: 73866230729e57d7e94d947f45978c3599f4ff27d61bce067224518f26dead9e
font_02_sfnt_off00012bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB1 17072 bytes
SHA-256: f78fbd225069102c20d95a70fa21659554275791ac687ee47ac87d055c15a41c

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