Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cb7506b1ed4803…

MALICIOUS

PDF

111.5 KB Created: 2021-06-27 08:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a16d62655e7c0ce0dde84052fe355820 SHA-1: 554b004dd963b30916ef372de44661c1bc2dde7e SHA-256: 09cb7506b1ed4803f7563a4a5971a160360622e1129323dfba27103e0c26b64b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

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://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/28ad710e71fe54e5427957b0a687927f/gatinukolo.pdf In PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16092c95e53f81---93233451365.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/49631546611.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/32953464348.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1a9b48b29---nobovenopabuporipemabifon.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/16068318134.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/53240795841.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/riwawagomev.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f0c1c83d3---wilulalefiw.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/7345753997.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/312d2d466db1f5f35f75a8bc658fb73d/69940228314.pdfIn PDF document text
    • http://accronline.com/userfiles/file/wijokadexe.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16097259d76327---negusuzefibilimevu.pdfIn PDF document text
    • http://greenld.com/userfiles/28452535238.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160741f9f3bab7---noxudoxomumutiriraridosuk.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/984be02311bc1f302cd58011f16bf79e/86688395560.pdfIn PDF document text
    • https://kermanrooz.com/img/files/96975858796.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/25440429607.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608730e57f24d---67098795570.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/ruwevogisusidevupitanoku.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/c6385c4e9fff6b49ccff52c53ed533f5/66692539263.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebd2e040d3---25397326153.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0d7eb799b---linupemoritajejojejut.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/8h3dke25f15bv5e59keppf2ds4/80341529015.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/56370838358.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee798d9350---fezotapamutokezogi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=growing+kniphofia+from+seedPDF 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_off00014fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FB9 17916 bytes
SHA-256: ef2f5a3ca1f6bebef7b3d2500a8429ad4e7a90d66dd061000aa145388e7e86a2
font_01_sfnt_off00017f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001973a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1973A 11020 bytes
SHA-256: c1b23a6084a684c5a3fa94a8449740daefff1713c768869fe197a6db8115c148