Malicious PDF — malware analysis report

Static analysis result for SHA-256 be286f00c49b9494…

MALICIOUS

PDF

98.1 KB Created: 2021-07-13 05:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7cba4cb80b61ecd0fe0d1f638853c93b SHA-1: 780902c439b5f0d01bcbdec3400dbffdd7db7801 SHA-256: be286f00c49b94948db131433a58e3dc201c52b3e24fd72e66adfbbc2131938c
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs are designed to lure users to these potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/pemopiturunebaxogomakov.pdf In PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/601e1971870dc677f6db650adadacbbb/73770099535.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/461d33a9a264c2bb4ca037e8d7a8760d/36613595080.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/44012334342.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/e63tsmbs406j98e05ksmicl8rs/59488179858.pdfIn PDF document text
    • https://vieclambaohiem24h.com/upload/files/25337390340.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/kuworiledivatok.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f93a95208d---gixufale.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/5160963258.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f78be5fa3c09c22400e55118df286f25/nalawor.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606faab7dbee5---zemuzususegikuzunorovi.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160946c1503f4d---91793310821.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/8faab72a71b165b4b9f73d19e612ca1a/kagamelubuzurux.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/nqni5u7qfotqkh2nbvhfe57lqa/womubunawuz.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12fe8049b1---masixuxive.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef70f50b3d---15421895479.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf94f24fe1---miruwitegugomeru.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/43f1326163568eccd2ac981b9c7c8c7f/nevaviwapoxegekopajufuxon.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/9e17eb44c08b13d0eec57f912946ccd2/74827768021.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/0874afd9ca632e415dcbe8163b6ac6e4/xovadaxesizugifaxilo.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b00621dcf58957ac2496aa1cf87aa9ea/vilamoxe.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/lafimibososuropijo.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/nbla5ot28lfanlq1qer895k8t7/67925278402.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=reasons+for+flaky+skin+on+facePDF 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_off00011c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13415 17456 bytes
SHA-256: b9d18c348812dc31e90199443cc012748990f627ad9e2e944ec88b7257d01787
font_02_sfnt_off000161a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161A1 10480 bytes
SHA-256: 99ade347ae5cf36d102a8c57931b06ea2110bcccdffebcfbd739d6115aba7b0b

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