Malicious PDF — malware analysis report

Static analysis result for SHA-256 2065628b7e1eb154…

MALICIOUS

PDF

80.0 KB Created: 2021-09-20 03:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f5a016a32fb8e1c5182c6267ed89ec0c SHA-1: db1a7136e37f3405189c8cef0fe6a8f348434ca1 SHA-256: 2065628b7e1eb154cfce16e6d9089e3e07078a7a9b3dd0b1e90b210b2036f262
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=mi+browser+pro+apk+download PDF link annotation
    • http://thailaundry.com/imgUpload/files/karabep.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/bonodesab.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb260e5404---16527252096.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/98442362243.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/50706987110.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/vigoxemifenutepovijo.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/76765420291.pdfIn PDF document text
    • http://idominjazz.com/fckeditor/userfiles/image/bewutuzudalana.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/wepamiwiwojuxuziraxu.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/dozawuxeki.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/35457553756.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/fevanarujuwezumapofog.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147b41f1d0be---77529669868.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/24509944888.pdfIn PDF document text
    • https://www.speeddating.lt/speeddating/ckfinder/userfiles/files/51647879528.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613caae2d3604---xiwovuzuxanunupedazogogis.pdfIn PDF document text
    • http://raczcsalad.hu/files/pitun.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/ef2b6670cde571f3fb8e9546c745334a/virupimugegavimeg.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/12149485773.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614351052ced1---burasaredegafufoti.pdfIn PDF document text
    • https://mimpiindah1.com/contents/files/51809292589.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/32756307443.pdfIn PDF document text
    • http://cee1968.com/ckfinder/userfiles/files/40955161762.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_off0000d3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D5 18020 bytes
SHA-256: efa3f4eb3361833ae8e1b9de2b35ade71b403c532a64ca47b965deaa973b4446
font_01_sfnt_off00010272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 10600 bytes
SHA-256: 6577666790707e1136ff59ac40bbc051f5044674df9ef054909ff8914b2df517
font_02_sfnt_off00011a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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