Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d23dfd2fe38b6a…

MALICIOUS

PDF

154.6 KB Created: 2021-07-29 17:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: da4732ec28aa8a10b9a454ea7621c16e SHA-1: bc9f9dfd8b7862b0d812e88fd3af215900d27333 SHA-256: 94d23dfd2fe38b6ada349188bfc5016842d684a72337a7f15527a0a6e3a8aa94
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs that form a link farm, likely designed to redirect users to phishing sites or download further malware. The PDF's structure and the nature of the URLs suggest it is part of a campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9547

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://crysiq.ru/uplcv?utm_term=whirlpool+quiet+partner+1+parts+list PDF link annotation
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34661450590.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/9daba2fb96d1a5fc678ef77c10ac41f8/bunal.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/52bcf0ff63ac43fb459e76d2f15aa4f2/53263604809.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/6769024482.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210704082120.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/4e896c1d6aeb09f46133a6c643e59ad9/tesobipulo.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/56455953273.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/76219619524.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/46c5a81c514311d5888d4bd3c6f879af/19829615982.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/74604697263.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/riwuposaduxuvinu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1de748aaf1d191ac3eb5650f9617f9ce/wokepixujaxusikimumusad.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eaf0faf286---fusek.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/f886af21675d2997f3492f2ea4fe2a3c/4422537090.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2ca90140c---96882973856.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/silopip.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210717021235.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/524b3749fc41f054808a6fdf9fe6e991/23206803489.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/72684779804.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/64531331035.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160aea91e9099a---84020596700.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/83509188606.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/33035479694.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_off0001fe27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00021639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21639 16568 bytes
SHA-256: c6b4acb839332ac53da1427bc7bff00a167501dd79020f9313b86fd880843e21
font_02_sfnt_off00024194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24194 10640 bytes
SHA-256: 51ed9305144437969ede6761f9c574f95ab83f0325eeb6b66a6438aaa5d988fd

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