Malicious PDF — malware analysis report

Static analysis result for SHA-256 62afa62e034476c1…

MALICIOUS

PDF

91.7 KB Created: 2021-08-03 11:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9fa4f36f817e3d4c8609c7cac0a24a56 SHA-1: 53a2cb043438d878b20441a1c154cf0ce57892b4 SHA-256: 62afa62e034476c1d58f08bbbcb20af63963d3ce10061c089c913ce12b8cec2e
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 as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of external URIs and link farms indicates a likely spearphishing attachment delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://infrive.ru/uplcv?utm_term=brawl+stars+private+server+apk+latest+version PDF link annotation
    • http://imi.vc/upload/files/fipiluvudijepopedetetusup.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/8a5f7b69b60ad02331bca35121271da5/6251285234.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/pawoki.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/99349442612.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d968607b2d---82438597312.pdfIn PDF document text
    • http://skisun.it/userfiles/files/19175157649.pdfIn PDF document text
    • http://fitviewer.biz/files/file/28182021982.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/eac866b24c3ab30c6f55c28f48810bd6/lebazarawumekirezez.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a39012f5b9---15257011009.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/69518283884.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/89982201515.pdfIn PDF document text
    • https://webmenuplus.com/images/file/ralakejeleratatoxewuda.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/namamuwapaxipisivegas.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/b7a9aa1d860e7be8a9bfe0bcfebe18fe/lurexob.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160817388f1970---nopirorezopufexusara.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a52cf60d1c1---27910597992.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cf73b57fa4d---dados.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c96aabd5d9c---kipozinor.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fa2dbb94a---32602310624.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082869e303b2---wazanef.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f45e80f29---rifidilixitusevuwopuwise.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073edcb8b17b---danonaju.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/cc5383009e6dc444f150841d04114954/wizafitupamuso.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_off00010540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10540 16380 bytes
SHA-256: b208395ed44d96309a6b249e1d2b07675abecd5d5ad5413641b077dfd801f3f1
font_01_sfnt_off00012f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F77 10544 bytes
SHA-256: 7ec8ee4f7e0a5751c951464d858367c623295042596d0c5f7b8b70dbe4aefb2a
font_02_sfnt_off000147b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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