Malicious PDF — malware analysis report

Static analysis result for SHA-256 0714c8c06aed57f8…

MALICIOUS

PDF

85.6 KB Created: 2021-08-26 21:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1720ecf4fcaa61a72e170ddfe2ddc486 SHA-1: 68ad945bfd89ecfe83100876cc16548a9f33a080 SHA-256: 0714c8c06aed57f83c57ce7cf94a6ba4ef96d3f38a27d6a41643e0fe6f4ac180
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit kits. The file's structure as a link farm on potentially compromised hosting is a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161072e759840b---34265116592.pdf In PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/r8ffl72fj203d1vv3vaq9nj093/bumumamodedasixad.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb610bc14e---13921489258.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/wonopozugegoxen.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082210307bbf---86087089105.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/memavegazelu.pdfIn PDF document text
    • http://fkhd.cz/data/img/rilapakugavuneduk.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e937cb41e53---57951608373.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/46341104800.pdfIn PDF document text
    • http://aven.su/userfiles/file/13073402405.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/fc01e5107685bb976dbeb2af37e468e3/29616253170.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/dfb4101e2fc1f04527996a52493bbda0/91726174452.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087e703e0f61---89170630276.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/rugufuxebudojajizuw.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/62533732567.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/daduwobuxumufekus.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/18521196257.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/58821721547.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e416537875---jufolodefoxegimiki.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/17012226850.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/dtoclmhkqa2fsk1l5oc2niht7b/4405935813.pdfIn PDF document text
    • http://wsm.hk/images/files/wimifokibazi.pdfIn PDF document text
    • http://caf-ljubljana.si/docs/nezodofopesififefisurabi.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/87ce8826fabeb6dd0895823be484d322/21934894652.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+spawn+items+unturnedPDF link annotation
    • 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_off0000eaf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 17040 bytes
SHA-256: d8e62286bcc255372b3fe8d7f74c2ac27900b4a6722b95afb733205cbce965ac
font_01_sfnt_off000117a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 10684 bytes
SHA-256: 914079ca45ba1da68f30754c9dafc59f3e1d0019665d6eaff796107a7210cdba
font_02_sfnt_off00013028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13028 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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