Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ddd7a954b439ed…

MALICIOUS

PDF

82.9 KB Created: 2021-07-08 04:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6d30455375c4f38153d43b2a7f2b4f6a SHA-1: 9b02d85bce9df6b794489c7643be816d4a944546 SHA-256: f5ddd7a954b439edac7e21034341b3d3727aa40823674303ca1dedeb560b7d31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, specifically indicating phishing and Trojan activity. It contains a large number of external URIs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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=project+proposal+of+ngo+pdf PDF link annotation
    • https://airtelco.com/data/users/_/email/files/nikisavubasazujelebenux.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078657795ac0---79231633839.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/disixinuvifupudo.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/bilolituzojon.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///38607875056.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/h2pas937opot53rboofaps5atv/49989773315.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/dumopajusapewuminaxado.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///2836702716.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16085c20b36297---merejeseluvuwaginavafogo.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/kavekobajakisudebati.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afc511796bf---50034391530.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085668aa0863---38523151939.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/cbf3b064da059c85aa50f35f59af63c6/jijowifivibero.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/81852910419.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074375bc62b4---fimusosinolateso.pdfIn PDF document text
    • http://specimport.by/files/files/49982839469.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210704_EF28BA1E4E301DB9.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b51f4cb5c---dobexibiwo.pdfIn PDF document text
    • http://isgsrl.it/images/file/93474732383.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/gatupupasimapipige.pdfIn PDF document text
    • https://baptistfriends.org/media/penarolot.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 10832 bytes
SHA-256: 12104e7ee3128fc77719b27194d7c2550a9eef9d1eb7aa819ed139ac04edc0f9
font_01_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 16500 bytes
SHA-256: 5946f680cb1db9c5d3e9e055a3dc02d53fa23b292bef0cdc06f112bde0f20ddd
font_02_sfnt_off00012669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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