Malicious PDF — malware analysis report

Static analysis result for SHA-256 05586a258533fe80…

MALICIOUS

PDF

83.5 KB Created: 2021-08-21 08:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fedf9a6e8eeb3fd6818bc6a84ba35011 SHA-1: bc85ef5b137c5235e03849fbcf8698e8c118c5a9 SHA-256: 05586a258533fe807b58e8cc2bc6126687ec5732d374e157512e0a21f4bf3523
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress installations and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3c3f1dd6d---7180393941.pdf In PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947d13ed54d---65317000939.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818262650de---wetupobosedu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/0aee82b2628f62b482073ebcf1725956/vikedatofura.pdfIn PDF document text
    • http://lhs75.com/clients/46937/File/pagurezu.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/fa562e5528b2ff0f58ca65929446a3cd/86924597159.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160706c8902e99---67911870884.pdfPDF link annotation
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/88d27f47141a0e6f5e67e4cc223acff6/wutufu.pdfIn PDF document text
    • https://digireg.it/upload/88428867993.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/26048054672.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/i01pn7aelnk0t4s95ekl89pgbs/xisufusaximadoj.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/71599635860.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adfebfb0a55---54051718251.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/95888291003.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78bf43e4b5---wuzebekumibosak.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f19b89273---25216699236.pdfIn PDF document text
    • http://schubert-hh.de/image/file/nofivirogodibibig.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c47e953ed---vijebamub.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff66f8f2859---vimowonowatinafojef.pdfIn PDF document text
    • http://ecandrychow.pl/Image/files/19363530372.pdfIn PDF document text
    • https://lapakunited.com/contents//files/68514187590.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=exothermic+and+endothermic+reactions+similaritiesPDF 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_off0000e1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B7 16996 bytes
SHA-256: 4e20cbb3e12667363676da06a3395f748865c7b31e6f9a72988469e9fe8c6fc1
font_01_sfnt_off00010e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001266a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266A 10720 bytes
SHA-256: 7e5dde08a8cb410d8c8b721d653e8ef3eeb7fdca8fa0690facc2c408c3fa30b5

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