Malicious PDF — malware analysis report

Static analysis result for SHA-256 85fcf490bae4b4f9…

MALICIOUS

PDF

88.2 KB Created: 2021-06-30 09:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d064bcebf4e6d6c294f23947406e8668 SHA-1: 236b8af701d9608379f7741bcc5b555499c9dcf9 SHA-256: 85fcf490bae4b4f962ffc0e0c6049d98fe2207e3edb2a909c9472feee8a83acf
184 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including numerous external links, many pointing to compromised WordPress sites and disposable hosting. The presence of a visual download button lure, combined with the ML classifier and ClamAV detection, strongly indicates a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and linked URLs suggest it is designed to trick users into downloading a malicious payload, likely a secondary stage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=best+pc+game+review+site PDF link annotation
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609f78a00c42b---24412844605.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/74930dc62f7615a79d995bfcc79002e9/digeg.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/3ca4e562fcc072e9b1da63028d2d400b/nepilena.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/28029290508.pdfIn PDF document text
    • http://omni-links.com/56096514579.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/babibekesewidasedajir.pdfPDF link annotation
    • http://garmagostaran.com/Upload/file/nomedo.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/561391f6f729af3a63488f84c4c0926a/65683694932.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/kilifamulijo.pdfIn PDF document text
    • http://clubchic.lv/c/i/files/53980349729.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/21737586978.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/69049543589.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/caq075dgf1qj7pij6juoembrd5/sukadarafumoki.pdfIn PDF document text
    • https://haidangpc.com/contents/files/77023578785.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/2edc85879b0a7baa87345cdda34dd7b3/riferemifanuxitawugesexe.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/tazosazudaretil.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160756ae5d1437---lisetonokemawunawegeg.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8e85694e8---rodupizunepezikirarajoru.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9c55be79e2effa615dac87150881132d/16557842857.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/83296811827.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/45a22bae64fe7c60657c740627b764b2/67841507062.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/93207738893.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/p4cos79evphcldh915885eth5e/jagob.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_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 10652 bytes
SHA-256: 84fc0a214c5a9e4316f87977e7221177d4602ffda351d84047b42f428353610b
font_01_sfnt_off00010e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E51 17496 bytes
SHA-256: c4bba6075c11d10ab1a0d650682ebbce66f2269465a73674b8684268a6daf697
font_02_sfnt_off00013ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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