Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e110ef7a52d046c…

MALICIOUS

PDF

73.2 KB Created: 2021-09-23 07:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 207464bc2a4da16e81b50a73633612b3 SHA-1: a7c4eb39119cc87d6003bf9aa1ddaf4a18a179eb SHA-256: 2e110ef7a52d046c5242b5c9839e149998e38deff7513a3bbfb009704c8777ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/21040533627.pdf In PDF document text
    • http://www.mostenpo.jp/userfiles/files/47498495852.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/mugeviruvobat.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/55824501461.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/labezofe.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/64043309787.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/qe0ra6eh2ml67erpq3m30mnvi1/lokibimogobokogula.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/palapademusogezotawakej.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/47654631087.pdfIn PDF document text
    • http://diencongnghiepvohoang.com/uploads/files/wajasumesu.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae74e0c18e---suteli.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/newabenotimipoferibot.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/67039382735.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/lowumejuwufekafuvitu.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/menuzejanisuwuvinokiz.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/86457079520.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/gaxom.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/04fee0f97e2e3d06e7dd5a2a1a61ef1b/47503883458.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210919094517.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/81276721356.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/fimipumibufagi.pdfIn PDF document text
    • https://sierrainstruments.cn/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/86977692989.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/93076d19fc5664b03fe0ed61ceeaa6ab/sukajabu.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee43ea2f48---nukufuvegazotiva.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/44517639225.pdfIn PDF document text
    • http://tasfor.com/files/galeria/files/vemerofezojiwa.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/55200363269.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=neelagiriyude+sakhikale+mp3+song+downloadPDF 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_off0000bc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD433 15556 bytes
SHA-256: f485cf13eea34a0f394c256a3658771a378e5c772a50e0b8dcfde3feedcb9a0f
font_02_sfnt_off0000fc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 11280 bytes
SHA-256: b75a031d87882f69555cf94a718b8d0831f7355e67daa7504b7e7d2a38c53109