Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d622097ff02b690…

MALICIOUS

PDF

93.8 KB Created: 2021-07-02 02:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aaada387da1a58a6e5823a07538932f3 SHA-1: cf74629f93700fcee62a55cec7b056b43944ae75 SHA-256: 6d622097ff02b69085428bc3674c600f3b2ebbbd5f721dba9af33ee16bc60dcd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://cargotavio.ru/files/file/kisexik.pdf In PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/7589gn6vd6nfirrrfjht4mlo04/pokerodaka.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072b42b3c144---xexuvopaxan.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07884c06d---59153158939.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/djtimso1k660errflia0tmt4m0/nofodikerase.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/xizemuwanagixanez.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/4nukbg3fe58rh060dr1b4b4h9p/xabibujuw.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/b7uis9bnhnre64p7qa0nv8jjrt/30588153372.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/43111811548.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/letaxejodogiwupiz.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7943c56c0---pazefudefodus.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66cf8ae36a---9844893750.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/somejedasuxixunokadip.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/88880683029.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e701477d2---wusimo.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/julutasinesin.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/tapim.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160874d1557bc1---7485117555.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/wexojokurud.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b57ce005aa5---muvotaba.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/58615167212.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210531_24758E794806FC8D.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/80578192372.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/352c58a7070e07e06c7f7f28c4fa7ee8/20815112132.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=labia+minora+itchy+and+sorePDF 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_off00010d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0A 10800 bytes
SHA-256: 86feba53c70e9cd324fcbaa61504488c905f973d0fa09d7b8cb7a060fc5df666
font_01_sfnt_off000125c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C6 16976 bytes
SHA-256: c1e648e923330684077d704979ce9921c1bf17afdcfd593c18916e867d1d8b23
font_02_sfnt_off00015235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15235 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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