Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5f7fbf4a3e1f2c…

MALICIOUS

PDF

212.7 KB Created: 2021-07-22 11:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 9cb1bd05db74c73321279037a4aae02a SHA-1: 25280ca089fa2d314460ca6570144587e3b991f9 SHA-256: 8b5f7fbf4a3e1f2c8778005261ea12e30dc5d451c71a2b762191d98e9aed1a07
126 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 0.9559

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.
  • 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://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/lv8hsjc8qchb6dpsu2lvk281ce/wuzemorexebopop.pdf In PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lejijosuzesulosupurod.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/b225deffd85bde77266786b91640a742/7248323192.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/kgg96pv3c2jmvu746kipr78e9b/gisuminu.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/kl0shs0m6c4us19g9vk4jpa2tf/55706696693.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/13263884031.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8e0d2b750---58597018454.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/favudapino.pdfIn PDF document text
    • https://aedwea.com/upload/foto/bugudulafepiperalebo.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/38185792646.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/43613476012.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f62d8505f---beduferiralofuwetesomaja.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160929018008fe---17226159555.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/dadosufen.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088fb71b5dde---51055888285.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608193fe1f974---suzijafinogef.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/d6089fc6968874596474a82a96a45fc0/52535276052.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/540e68ef6730c545c80e6f0065ad52b0/nubalofamewagelimujufuziw.pdfIn PDF document text
    • http://dichvuketoansg.com/luutru/files/kuwunosizuguror.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/82831164617.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758773e2aa7---22012895004.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c5deba686fb---26968665398.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=longest+word+with+only+1+vowelPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/65961c18f7a5366081c5f1a39774b70d/69851836587.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002cb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB01 19012 bytes
SHA-256: 552622c57bc48ca6bb7198cb7f1280625a81f92bb83d86d861848b0188766b3a
font_01_sfnt_off0002fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCB3 16800 bytes
SHA-256: b195d9a5971f325bc1efa38a269cfac09cbf47d0181cfa56cda9fe5ec3adea8e
font_02_sfnt_off000313e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313E4 10640 bytes
SHA-256: 8d81abc943ef6a470b04fe6cbb83d310547f5306dcd61d19125983324d3bca61
font_03_sfnt_off00032c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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