Malicious PDF — malware analysis report

Static analysis result for SHA-256 149a4b36b604467c…

MALICIOUS

PDF

272.0 KB Created: 2021-07-02 00:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ad33f3b78fc0b84fdb0edf01c45b104e SHA-1: 3659697b54fbc842966b13daa9aa6d1fcac200c1 SHA-256: 149a4b36b604467cf15e9676efa85c80dfeb42cb6269605e1b964be1a448dacc
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, indicating a phishing lure designed to trick users into downloading a malicious PDF. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing campaign that likely delivers a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9792

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 http://marty-triple-m.ch/inhalt/files/65089800189.pdf In PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7d8b9b076---davowovidisiwarizesiwap.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16079199905e6e---sabix.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dfcba3cc8---68349666390.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/nenifuwuzovaxizikumemerek.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/573ce77e1be3e8574a2352761dc5d72a/95925444506.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/442473fcd88e183f62f8bd091fd63c3d/99184508922.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/todinabezurufame.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/e4cee3f687dd3174c1c76a1621889dd7/zurufi.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a75c48ca9fa---75485329769.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/68095336894.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/jpjg52ium3jvrdnce5q76srqlg/70323251788.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/21505285624.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/pelun.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c099aea3a7d---pezel.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/37360955109.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/s48cq99maf2sv516uvb4pngn3q/43156129115.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/53758709737.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/f2a6e0cf43fcd30208e20e91d512d8cd/67101763150.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5aef655f9---37232450790.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/b61579c82eed5da5cf2e0a4075fb7cff/51909202058.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16083752030e2f---tuzagumelumoxatubowiparo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d346b99d96---sogowatevajedipisapumuvi.pdfIn PDF document text
    • https://badrivishal.com/media/29519556604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=as+you+near+an+intersection+you+discover+you+are+in+the+wrongPDF 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_off0003d1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D1F3 17392 bytes
SHA-256: 2fb5af090c61d5bcce37484869a9839ca834ad0ce7315d90138e87f662ab35e3
font_01_sfnt_off0003ff7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FF7B 10948 bytes
SHA-256: cc11465d984abda2a9c1873ceb39c410772621651cf6003a3557a25e52a69639
font_02_sfnt_off000418c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x418C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1