Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fbe61af966e1ad…

MALICIOUS

PDF

82.5 KB Created: 2021-09-03 23:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 42b9d0f8e9c8652a80fdf98412b39b11 SHA-1: fec67a13a102f7c77e53a260df8e291676529213 SHA-256: 68fbe61af966e1adbf6ba3d18cc5a10c4bb3044f8f7e198b84722380a78fe244
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories, indicating a link farm or redirection strategy. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd21f289422---48149872019.pdf In PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210814_D942818AF11AC635.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/45849888215.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/lesigafavedekunuzekuresu.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/6951846185eec3da80563f8c59ef2bb0/nutabexenorunozam.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd426c35f1d---70608037639.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/tonotosubisusiv.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160adfc8dbe38c---6743771756.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607733de6c6b3---50262393060.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/a16e056f2401cf99ace17c9a6ae9a0e8/jabisepine.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///7350989463.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/418eac4dda9fc034d9b002d3af935a6a/31174149278.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070732281ea1---pirodaludogogozawebege.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/zilovarazupilubisig.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20210819003419.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/fizuf.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/q1qrscsgv5oljckpluqants286/venokogojomoxisob.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/xotuj.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/8585218865.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kodadowotila.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/166952262760b394501ac50.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/xuxuzu.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/sazelovigijegejux.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/sgnu036kbftr0qc95njf2p8f05/resegejanefivegur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=sindrome+de+ovario+poliquistico+infertilidad+pdfPDF link annotation
    • http://irodori.kir.jp/files/file/wuzenus.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_off0000d8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B9 19528 bytes
SHA-256: bea5ed6e9ba5efcf094bd39be272f542b69676c0888f2df9eb417c8fcc368fad
font_01_sfnt_off00010a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001223b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223B 11168 bytes
SHA-256: 080fb05cb3ca91a6d18a2d8c11adaabf5665314f21451c526c50e3a37de6ab25

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