Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0526f464e2955c…

MALICIOUS

PDF

70.9 KB Created: 2021-09-25 16:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9d108ec5cb56bd9b1ece8dfbdcd4528c SHA-1: 37020b94c4a9c841c55c17774cd6202db4699c01 SHA-256: 3d0526f464e2955c9d6df72e37cf7ce5067a8a9635bbc9c9ae29c8c5a3832032
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised websites, suggesting it's designed to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crewmak.ru/uplcv?utm_term=life+partner+shayari PDF link annotation
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372e3e427e7---vajutimuv.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/2cdbae3c8ac34b7c8d16f9403b598eef/2903925358.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7b2e4650137a3fe89204aa30e2757214/17508477143.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/penoxawewomazogo.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/muzaditapo.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/tazifubenekunororisojixog.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/162ad92203e6f2573225660a29018ee1/65634068680.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/lafuverapebavi.pdfIn PDF document text
    • http://silver1979.com/upload/file/nekovevigitupozulino.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/48366902426.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/nuwam.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210908044447.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///71498325783.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/10324051804.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/231992413.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/50201121746.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/konojugifumolo.pdfIn PDF document text
    • http://nbc.ua/design/pic/file/16485932586.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/83263768006.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/rikatinajafip.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/lawexamevitinatagomun.pdfIn PDF document text
    • http://jlicentral.com/images/authors/file/nimajev.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614db28d095aa---367653607.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/rodivisu.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/36346494010.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB26D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7F 17252 bytes
SHA-256: 912e497a373458b05381630548f8a18687f37c93d426b2bb8d0e1475da5f6ef3
font_02_sfnt_off0000f700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF700 10360 bytes
SHA-256: 69d96bfc7897a3d7380e85467ec7bd4a35e1d92ea492fa81c8b499258aa4dfa3

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