Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c94bc12c0f00f2d…

MALICIOUS

PDF

85.6 KB Created: 2021-08-02 23:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: ae2f6ba0dffc8197169ced2544f709a8 SHA-1: 7b26f6b2f7cb5755defae2d4cb709bcd1f76a876 SHA-256: 2c94bc12c0f00f2d24da4da1cd5ad92bd59a9ba38612af21470fb4a8bd678caa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7a69e08c8da2f0ceb2a205e77c5a8518/18678472383.pdf In PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/64023825590.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/zejuga.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/cd6b5f0sfre4tun8tlfrq5kpr5/16547528263.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/289cd80115c74107b6811277da8e6c55/zeziduzupinesirarodu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ol6hkss2auu0q0gbie7vtiagf6/wilumimusomajikujo.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/gifibuxam.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/89emrucqvke7l34bljq83q1u83/daxawe.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d695283899e---18304155548.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b02d7095d2f---43092657579.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbe9fae5a0---zumidanenew.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b946e7bc3a4---mefofagatojunede.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/radabulatikobimojex.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/c3f03c0089136ad99d9370c0d6031378/ridutade.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/23bf1beb70385d66c49ddd2dd932ada7/lusajowogebegotafoneguvo.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/923f5a2024898e993b1c22f17b9ff849/77747717239.pdfIn PDF document text
    • http://ned.ru/uploads/files/samazagaxowapekigiwij.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/lomona.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/or5a12an9vvgu5j4hof1f3i770/tufoguxomagibigowi.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/6785963491.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/alnqn47vd1ig5dq3lqpo0nt8c5/xedatenuduwevasafoketinuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=what+stretches+are+best+for+lower+back+painPDF 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_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 10888 bytes
SHA-256: d785a38e74a105b3b8932716ff960ea074e77c2a843683c0fd6f64db6956c9f5
font_01_sfnt_off00010685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 16208 bytes
SHA-256: d9c32855205986f2c7b147b60954dc81f8f1037e22add9a22fa22b8c6c081be1
font_02_sfnt_off0001307a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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