Malicious PDF — malware analysis report

Static analysis result for SHA-256 3468c50d2ddc2b03…

MALICIOUS

PDF

144.2 KB Created: 2021-06-30 22:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 60ad244f83d9ab66ed7edbc1aa9d3697 SHA-1: e481536ae1ac795b01091b806167ef72ba6e8c66 SHA-256: 3468c50d2ddc2b03cdc2cd2ce4b7ab784e1d11a2fb189aeb02ad215c5ae491e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://smidgel.ru/uplcv?utm_term=hypersensitivity+to+common+substance PDF link annotation
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/b5467026e19ce36b3009c9b2348720f7/fuwepejorolufin.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/360eee37ae8df3f2692ba3ebad4f2054/suwojereguwoxadage.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/69146949869.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/c6722lmkm8p56k23957b5o4d8f/41039836463.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/39c3666c88f4a2806a8d133db8ef1624/30948032218.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/bafbd28e3ab3748cd292d07042bfa6c0/51888543340.pdfIn PDF document text
    • http://93564497.com/userfiles/jelabosogom.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/luzudozapazam.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/20103369661.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/9554544b075f113396e7c35e9d288639/88326355993.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/ba908aculj7e7boptv2hivm909/52247578250.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/fffe02156120b4be574a5ed43d8eb5da/90369697528.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bdb523f57---13277589122.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/0a99e3713538373a11011706fbb030b1/435570650.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ee6b79075---30998128546.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/19460704889.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/4bp54cq11h9pq99l5bc96vormc/welebegogonixadik.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/359b6cb144d591a7cb865f09e5bcaa92/17966978450.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/14028937871.pdfIn PDF document text
    • http://bienbao.org/uploads/files/72544763787.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608436534f0fd---tinanofadiwexizikojam.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ki8psgvems48sjf799t9qe0fad/38779821783.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/n7g6v8iksj3hi41o21u02e9ls8/21267297931.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/zosewudoluvu.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/164d719e2f828657524e70ba2676f302/nerata.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_off0001cdd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDD1 10900 bytes
SHA-256: 84068233aba68074ae4bece21525ef5fe17c6bdc08bf2038fcb37357e20ad6d7
font_01_sfnt_off0001e6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FEEB 21036 bytes
SHA-256: a1ca6160fcd3a5f49a98ffbf5b2bd643770c486d251bd76768369c5c0edbaa47

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