Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba7d367bb1ecfef…

MALICIOUS

PDF

76.8 KB Created: 2021-06-30 00:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d1e11e00b592f714e60b8f55a4ebaa61 SHA-1: 5040e5d6d0355b273dd0be99fcb65dfb17115077 SHA-256: dba7d367bb1ecfef3b9aeed315fdfa111708e5ae7cdcedafb8b82701a691c44b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links pointing to compromised WordPress sites, indicating a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these external links. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://coretry.ru/uplcv?utm_term=aphids+on+butterfly+bush PDF link annotation
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8ea03b3a0f7bdf3880fd3c9d937dcd78/zefodirevekogos.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/4f2efcf12153a78acd5c8a4ecaf3400f/weraviguzavulovupumimo.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8087c946c1---49460516539.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/9b7d05d608cdf1b250333272d1317bce/wixupokuvudeku.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d76204190---xosoxukenav.pdfIn PDF document text
    • http://prosquash.by/data/bugavivez.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/401f5beaec6ab0fab00f32b01073ade7/500996842.pdfIn PDF document text
    • http://edgecs.net/documents/bosunuviv.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a06aa3efe76---73164861944.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f4529bc7046b9348082defe4481e4bd0/66370734170.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/79a254d0642640b6762180cf9241068e/neriramozosupizamukugabab.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/8e878caafdf14a163912d684a0c0929f/kamuzosuganariziterufojoj.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823eab8319c---78335966368.pdfIn PDF document text
    • https://agermag.ro/mm/file/vezemovem.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092dca4d17ac---mirajexazikiwurawoloj.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/e283e5d557710fcddee7c751fe1b83a9/43443746103.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/55751515579.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e56ea6b4b8---vedanotipufodo.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/6647590366.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784b83254b0---vetowopokexitelexa.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/wawixunigokifiloguwuga.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/kofaxexe.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_off0000cac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC5 16456 bytes
SHA-256: 78450fc0fc155d3290ca6fe43e0f31345be279eab973acb6772ec3c94f290f84
font_01_sfnt_off0000f56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56C 10768 bytes
SHA-256: e15040cdbd2022a76dfd36b6c6b0bfc4af66571badd98a53c41a0a8020fec3e8
font_02_sfnt_off00010df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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