Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75daeef6464fdf3…

MALICIOUS

PDF

85.9 KB Created: 2021-07-08 19:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: dd8cbe7a5421540d65532072c5240366 SHA-1: 4581820f806fa78e6d19f2aef9d50e1f2e604138 SHA-256: c75daeef6464fdf321b0b35fb4eeec18f1b6f73b256641a09cbff29ce86b40e6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://drafthe.ru/uplcv?utm_term=minecraft+barrels+drums+storage+and+more PDF link annotation
    • https://mobile-translator.eu/app/webroot/media/files/xijepavipugikidimazapo.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/1c256176c394624bd451700978b02962/57588567616.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972b3d322e6---gaduwatafuvowivobilex.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/rgsb6t930a7u7buspj8jlagja4/4930193794.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c2e9dccb6---91105128460.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98b3344e31---werujegelaxisoxemufo.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850fb5a8e31---gimutajamuno.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4e149bb53---4539348978.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///zameburuxajuvejol.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/wasozovegi.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210624115719.pdfIn PDF document text
    • http://446888.top/userfiles/file/72179768951.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bc122503e55---10538413725.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/q4ng6k3oos4qc916n4pnptcso4/kidanam.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608085c2f081c---79265138701.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/7325aa3c326632b06cdad7b4ecbe7277/94517015232.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/110739efeb861caec9c84f91d164ebc1/69412257073.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608461158bdb0---tejuzuwileledew.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062300474078.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/u66092atp99gr46fshqe42inst/xemomokapuvem.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/gomerafakafuropukikosonuv.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607638281e0ee---15060607596.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/resepubemolafamotuwone.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/zadenaxidovekeruguzi.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/97937432125.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16080b5ea30722---20751420496.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_off0000eb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB45 17428 bytes
SHA-256: 97cb98b742c566296d98a79b5e1b2b1e818634b57daa563d333c786af0257df0
font_01_sfnt_off00011881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11881 11052 bytes
SHA-256: 520bc902aaa18105bc178f8b750f3eb470f9f499b8cfcdd6433545c6e2f46daa
font_02_sfnt_off00013207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1