Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6acda28cfc24ddc…

MALICIOUS

PDF

84.3 KB Created: 2021-09-05 20:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9c16b14f19c17c3ac01379c5c1988c2e SHA-1: 9172304d443f2259927dc7876e32301d5a02bcfa SHA-256: d6acda28cfc24ddc81be37b24daad7503b2645a2bf21ce78ac21692692200c2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the PDF structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/70058096704.pdf In PDF document text
    • http://aaykpn.com/uploads/editor/files/jumaw.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608358755e3b7---niluwipubazowelojipudaxe.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/83592265094.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/43o2816k0uo8hg4fm2ghmgofs3/luritapinisukajexitadapos.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/tinisowe.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/venutaweveviwutoketubusuw.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879b5d1bf42---tuzevinemogu.pdfIn PDF document text
    • http://dichvuwebsites.com/media/ftp/file/zoxapapugumerugupis.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/31094401635.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/59049337828.pdfIn PDF document text
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/13238162454.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/tawazazudon.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/90902608453.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/39704782036.pdfIn PDF document text
    • http://sam-global.info/files/file/mejizufofi.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/33420003300.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/tagodaxetu.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/nezesipozuwujorus.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707a4269445---59455597383.pdfIn PDF document text
    • http://caramelitos.sk/files/15212702995.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fd4a0866702---tediwasemezokelegotekafut.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/20e89115bce19f62bc9f3c15ee742068/84596779314.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160890f97db824---33712116782.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/41234626712.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=manual+camera+compatibility+test+appPDF 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_off0000e354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE354 18164 bytes
SHA-256: 62a5cc9dc34bc84f6bb49dd1357593d005835f49c747b1509649bc4d41a4a1ed
font_01_sfnt_off00011233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4A 10884 bytes
SHA-256: 2e330bd65c53c60ac78fd76494bb9af5d7646875626453c3e6e2bb18b86159e3

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