Malicious PDF — malware analysis report

Static analysis result for SHA-256 d001518a897601ff…

MALICIOUS

PDF

73.2 KB Created: 2021-08-31 11:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: af9ba33869e93bc459e579dd6e4ad849 SHA-1: 3dc8ec35f1ebebafd5c64a4f6e4c0e0458d6bc64 SHA-256: d001518a897601ff0b36b169cd78988b9fcb5db4a9981bb698caeaa7c31762f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate the document functions as a link farm, pointing to multiple compromised WordPress sites hosting PDF files. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/i09ausa6dlf11n88pqn4cl9t20/xoxokowarupo.pdf In PDF document text
    • http://b-solutions.net/userfiles/file/234332690.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/poxotuwas.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1607741e9e13bd---50767849178.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/52074481420.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afc1904fa9---55594151345.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/sanidiwuxarogi.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/gbqr7ho4s2s7evpi12u7udbmb9/kujegofu.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/63579414404.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/83581642858.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/37149043763.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/13196611377.pdfIn PDF document text
    • https://metal-et-verre.ch/ckfinder/userfiles/files/moxivezol.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160977fd697524---jorap.pdfIn PDF document text
    • https://easybuildapp.com/files/uploaded/files/zotigololaderobasipepi.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/8858d370370aa6a903aa5d1e617bed48/zamuwodaxure.pdfIn PDF document text
    • https://aokman-drive.com/d/files/zifamosagazutokumubolur.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d16b65c27---13364336878.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/kixekifujid.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210505150130251.pdfIn PDF document text
    • https://btegypt.com/file/22357409989.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/pulul.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115339fdc11e---lividisovariwixumiju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=you+have+toPDF 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_off0000c0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 9844 bytes
SHA-256: b8c6d4d2c7b50b8b21e80bacb3beb41250e44b88b2a31dc1363c8c0ae92f3e57
font_02_sfnt_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 16060 bytes
SHA-256: be47f26d3f55dbe30e8008be8c7d7aafdbf59b615c5cdca704566e8f5bb10279

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