Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6eb45afb90c718…

MALICIOUS

PDF

82.3 KB Created: 2021-09-04 02:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2bec4b611cc0a18f988f2fe4b507b1d3 SHA-1: 61c3e7ef9805c6a7481cf5e92c73672b6f98ce66 SHA-256: 6d6eb45afb90c7182242952b9b55b7d0610392fbabfab874c8c3411b6b9b50e9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious destinations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/6a84cfca0ad9ce1bb8ed006bd795a644/koretukobaj.pdf In PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e952f18ac1---14284760514.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/44242510443.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/97387146467.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/lapamupunusizikeb.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9c32940ba---4270706986.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608842d64cfcb---muvawozivejamuxupemeteju.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ca4ec249a---87237593066.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/78205305137.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/m7ajp6pkskiav1809gbckksesr/fatenodexiju.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/79865230891.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/gid03tib9os0nd2qifik0lero5/paliresesozijawuja.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d1ef30456---54796071671.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/saxekirisixamedexetopaz.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/97317430720.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6ee0e6233---73245980817.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/54863477750.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/lutefobili.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/rafabogojo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6bfba8ad2a---46439890336.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/71549006384.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/pisuloluribobu.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/42eded57ccdf47a4c8fdfff0eb5f07ca/18595462414.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/dokemebujasejulex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=basic+stretching+exercises+pdfPDF 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_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 10888 bytes
SHA-256: 93c78ca3be3fbfd6a0ff15fbe032ea3ac5772f2f9fb692ef46aa24a4669c66a7
font_02_sfnt_off00010eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEC 17236 bytes
SHA-256: 41fbae233d17e133c210e0daf98a2eff6da98c20280fec9f0d49ee6b1fd160ea

Open this report in the interactive analyzer, or submit your own file for analysis.