Malicious PDF — malware analysis report

Static analysis result for SHA-256 22769428100fee98…

MALICIOUS

PDF

94.7 KB Created: 2021-06-29 16:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2785efe50e660b416a2651f4c5920383 SHA-1: d14a44501a2d5013f17eed8e9b70ebb8d38c433d SHA-256: 22769428100fee981b27c3680fe74931e9e12c198dff71f3b430e076b9cc31f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm. The presence of these links indicates an attempt to direct users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ostnrcm900o57p0c3k8ibocfdh/11457216320.pdf In PDF document text
    • https://dcoderesearch.com/uploads/71999870077.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/bakusaje.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/542f0cafa48181c60a8f2e18dadcc31a/76776905010.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/poviwidupiwuzujejifis.pdfIn PDF document text
    • https://laser123.com/geektic/files/7666721942.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/99dac630b89d8d37244d666bf0ea1c92/27511298743.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/fq3imjhg41jc3848ska5ok2n66/32301588102.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec3f35de46---lakovukok.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/57439439008.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/sqtfp01lgfbfp1km3m3lqbqagl/ruvaxesifugigifageb.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/9802fec08809f43e8a744736f75a8f31/tominixesedisabaj.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cc0f378d6.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f16c0f4a2---9195745023.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/d53af3216ab31a7555fcb6f8ec2cb254/20788196635.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16091bd757c367---11166061972.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85876445523.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/7802134946.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/23286853100.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/xijirimalikovenuxoneluv.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/23455948296.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/88ea4c0eadf79fa4c6b5ce610dc6d97c/gipivozoki.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/dssshe3euui038vo9ab0bmf4q1/27099346123.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0919179001620317932.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/sedixir.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/81253985691.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b008cfc7b39---gevofafivipopexigomizol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=every+pandemic+in+historyPDF 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_off00010edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDC 17372 bytes
SHA-256: 142d158709603f636fb1a2384d84e2009bec4e009331bf4edf3e31bb71fc4b6c
font_01_sfnt_off00013c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C26 10896 bytes
SHA-256: 6227bb8d0c000ad753a33784c9faf329a4d781fb96ceabe139b38b728f04c10b
font_02_sfnt_off00015532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15532 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1