Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eabfa3a33a82190…

MALICIOUS

PDF

81.6 KB Created: 2021-09-09 02:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8a1f997de2490e2834ad4dc5e7cb12ba SHA-1: ad44f7b113687d36b3f85e2ecc860aabfd51a86d SHA-256: 2eabfa3a33a821902a7cfc263a1cdc2afe61e62836ddd50c43454fc6a7071a14
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/64783596958.pdf In PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130242dcc6f3---90396264584.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16134a277bfba9---723297074.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/xamewozuladipatizizabugok.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/fikenuva.pdfIn PDF document text
    • http://dasbluemchen.com/muwezefin.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1612f45f15cd94---walasosopowapifovole.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/tugilomuzegen.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/80818406572.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/79672016114.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/52971319827.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/barigegor.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/wapirepokakaza.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/bowuxerimo.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/nhftdl68kc5tq351u49em6om0p/11350394241.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/wijapavot.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/tupimibumegadi.pdfIn PDF document text
    • https://scout-educationguide.com/userfiles/file/5691529.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/1162603198.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/neselojowatob.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/dolerekawujebawivofape.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/nutavuzafetadezekosoxugiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=adventure+time+distant+lands+watch+freePDF 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_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 18620 bytes
SHA-256: 4ab2b29902d8f14d0682ea6d62cda21ab01c5020f5263674d7bee7ce03f2ccdf
font_01_sfnt_off00010761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10761 10852 bytes
SHA-256: 31bd70e1fc0161612514c98f9ba2ab03eeccf2ab4c7c4e3c0aa375ce159a8823
font_02_sfnt_off00012051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12051 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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