Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46270544335e8a8…

MALICIOUS

PDF

71.0 KB Created: 2021-10-07 22:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e4180200455f94a790a736b3613e605e SHA-1: 971bb8dddf1195c67c244235fdb651b82688d52b SHA-256: c46270544335e8a8ca17e27423fbf6aa986e044b7aa246f356dc959661086eed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The file contains numerous external URIs and links pointing to compromised websites, suggesting it is designed to redirect users to malicious content or download further payloads. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a pattern of using compromised or disposable hosting for its malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://ketchas.ru/uplcv?utm_term=silver+doll+face+persian+kittens+for+sale PDF link annotation
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16152a52c7aa00---lulefibefuvugafod.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/92540665631.pdfIn PDF document text
    • http://cuanhavesinh.com/userfiles/file/lujulezipedubox.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/sogebeliraxipov.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337b5f427be---seruwekemumu.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/41252150362.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/87631155071.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/87653329791.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615b9a078a5c9---6675677932.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/94570315188.pdfIn PDF document text
    • https://deverfgrossiercms.deindrukdemo.nl/upload/files/rosogobuxixobu.pdfIn PDF document text
    • http://inistor.com/ufiles/files/55537766205.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/tedomorolude.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/vavawosivurutuju.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/delazewi.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/digajejipimip.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/tasulesibebukilubo.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/vulakavafilanuranukuk.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394bffcaf99---tesusamepobiluj.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/78669982222.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/88312292220.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a461cdcbf9---wejekoligufofuja.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/89789142219.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/vuvela.pdfIn PDF document text
    • http://weingut-suppan.at/files/xumozafidorezus.pdfIn PDF document text
    • http://phfamilyrestaurant.com/uploads/files/pidekadubuvenimilivifiku.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_off0000b4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AC 15752 bytes
SHA-256: 30d74ee207ee8481091fde3d5057198115058c81bd56a8ace039c79663ee9134
font_01_sfnt_off0000dcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CB 10848 bytes
SHA-256: 116fb708f0156f1029d375a4eb73c540ffbcaf1421ab5a70ecc0a209b1ea18ed

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