Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bc53765fc4fe5d…

MALICIOUS

PDF

85.9 KB Created: 2021-06-28 23:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8049cb37246e4c605c4d94cbfa377653 SHA-1: 78937ec5063d8e50cb6a21ab43bb2c676c89eca7 SHA-256: 14bc53765fc4fe5d38b85659a8b06d5b6a97136b807f94bf6182fd9b5b89b4d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute phishing content or malware. The presence of external URI links and the overall structure indicate an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=look+for+answers PDF link annotation
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/0b67cb43ca9da0baf62954259eb5cdcb/13717007817.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0c40a1464---2969752828.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/74899675124.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/6a13af05a85b81f260af8b7d162ce74a/20344068269.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/ed635ae18cbc723a42f4a2f616e9beef/97047716936.pdfIn PDF document text
    • http://fwullong.com/upfiles/editor/files/76825654413.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa6101165f---xafegujogub.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160988d957c372---bujunavakokebuboku.pdfIn PDF document text
    • https://nada70.org/userfiles/file/25137545037.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/22080106285.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/912d4821fb4ff642bad19853b0c22710/20300810573.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aa8eb6b58001797bf9b990091deedc07/losolij.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/wuvawob.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f93817ce97---98721916235.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a998186b43f---baruvebatetaraniwilap.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/60996215630.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160786106d9a46---nolokivi.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/mofaxifubuwuzaxe.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/e3bdf7ef218568a13276c14338c201cf/maduxusamiwemeduwoneziki.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/mabomekelebonurenuwofol.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0d3355c2b---19606047756.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/b2464d6720e4cb3e780a89058ec1a38c/30018210140.pdfIn PDF document text
    • http://guowangcable.com/d/files/kagixetitipenirenomemofe.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/fivepuninapevezivesexenan.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_off0000eaf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10306 18308 bytes
SHA-256: 7e40c951a203c94c142f1c48b04e20fde29056848289267b6308959863ab7b50
font_02_sfnt_off00013298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13298 10108 bytes
SHA-256: edceebb756da82e9baf2fe1771800efd88654c5381eb57922be3a1606e61eb39

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