Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c82014f5dd2ca9…

MALICIOUS

PDF

88.9 KB Created: 2021-07-19 16:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6cf24ae20fef34f3338a90ec76c6aa97 SHA-1: 67a56f7ae25cdb17acbc0bb19259451a66c93d6b SHA-256: 26c82014f5dd2ca9261cad0599c505af35efad89d5257f64dbfefee84bb60009
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm designed to manipulate search engine results or host malicious content. The embedded JavaScript likely facilitates the redirection to these malicious URLs, contributing to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wefocusdesign.com/upload/files/92433507713.pdf In PDF document text
    • http://davidhammerstein.org/userfiles/file/62248095091.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/24151619201.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5a3e3ba37---gokulomavopuzisij.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/tbb8u032u8qs7afuvqm3b193bs/jorekaz.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a8f086ece---59203486959.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/88289611670.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/a6b003656e3d60044cfb707cd4a8247d/1583656234.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608963e318c18---66356430238.pdfIn PDF document text
    • https://efnnma.org/files/file/61766573126.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/85142334970.pdfIn PDF document text
    • https://isosklo.cz./uploads/8103071875.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fb0e652f2---tofumepewetabela.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/vepivefi.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8d11b50b3---japimitepe.pdfIn PDF document text
    • https://slide-bearing.com/d/files/30137066882.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/pinib.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e37b66b82d3---pozufafovos.pdfIn PDF document text
    • http://vodnik48.ru/content/file/toporar.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e53bf017a8---vijomez.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887ee6198c3---6888601995.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/lidawomigito.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/102a7b224c6018639ca47b75e62fb7be/21021590597.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/10438891946.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=business+tax+deductions+2020PDF 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_off0000fa32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11244 16712 bytes
SHA-256: afa9fbdff080b4805cbdbcf6bae71a72d0d1d7b22a5173324f2e5b4bc1c7f9bb
font_02_sfnt_off00013da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA7 10716 bytes
SHA-256: 8d0c73ac2267302a5d82a8dfd6d73ee918d4f027f64dbc4743a362ca433be1f5

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