Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5a9f62a62c1319…

MALICIOUS

PDF

77.8 KB Created: 2021-09-06 05:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0d74077459efae9c2acca27886bac370 SHA-1: 531215d828c86ccf1e19752f24643d9453b1da59 SHA-256: 0a5a9f62a62c13194effcae417bbd5fb3dfebd385dd5c8bff8dea616fbe9cbfa
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to host and distribute malicious content. The presence of algorithmically generated URLs further indicates an attempt to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608157ad388b2---tatelazilapove.pdf In PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/ae5cddcb1f91328d381869ce8cd89dc5/sujiwaguz.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cecca9a5695---filubo.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/66bd4d3276e1704d7398cb84359c22de/xunopewa.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949ddacf42a---kufitufugumedimaxir.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a458aa07201---zawiva.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cdc4727ed---37751057031.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/44832152770.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1121e552d---zowibeki.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/ce53bcfbb9634565cb9a82502b1a48b6/mipusugulu.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607de05f40765---76766099849.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16128f645da2b8---62161834017.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/tenamip.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/56538da369a8131afe98833eca932f51/7499532578.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ljeaq6jik9i88nvhqecltcq3d2/36936197382.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/a919e8db3f87064e598a975f3474749a/puvegataradutadirenok.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/7kmkpc6v79frugjs5dua1c95io/rokawowimaxesagomoreme.pdfIn PDF document text
    • http://clinicaveterinariacittadivignola.com/userfiles/files/xorudusodegufod.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075aed898fd1---41726540116.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16116775a3574d---14888670626.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210810_687873D5DB9B918B.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/jaqb160ovhdrl1hutn9c57d9h8/83056505828.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/8ir5b36jp0so517oe5r1ckbdh0/6558053180.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/tolifol.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/54100639256.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=simple+and+compound+sentences+worksheet+4th+gradePDF 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_off0000cc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE434 11392 bytes
SHA-256: 3bdb2d61449683e3c14fbc15c3395d16a7ce3dadc58bf528f2e9c8d627c0c8b9
font_02_sfnt_off0000feba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBA 16592 bytes
SHA-256: 579a3f215986b60bcd5fcbf86fc65a7031622141de4e3ba22d77b5ac4ee52646

Open this report in the interactive analyzer, or submit your own file for analysis.