Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78f6f3629df0967…

MALICIOUS

PDF

85.9 KB Created: 2021-09-08 03:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ab3dc9e023752ef81a1c85d6c6378a6a SHA-1: 56e9fa1ca04d77e5d69dc32f91db4bf2c24cbee7 SHA-256: c78f6f3629df0967e134b9397726e3673e1f15b440b063fbff2ed8856e3e4025
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, 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 WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The 'SE_INVOICE_LURE' heuristic further indicates a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pistant.ru/uplcv?utm_term=pos+ingenico+pan+manuale PDF link annotation
    • https://eitmedu.in/ckfinder/userfiles/files/lozulonuguzomu.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/j5182qk24keaq1r01onq9tdffc/45636842983.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/wuzorubisekefe.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/favofurosodudafupoboxit.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/39504387427.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/tevotiwuzeruzupeseluv.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/xamudisofe.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/ef41395beb0fa2299fb291b908c77241/ruwoguzatab.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2806e003d---2280130130.pdfIn PDF document text
    • http://st-communications.com/ckfinder/userfiles/files/41625792327.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/11872813360.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/79694006302.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/c8617bf629e42634fbddf48c17958313/kuleda.pdfIn PDF document text
    • http://chaplains-camps.org/upload_picture/file/51068747833.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/webasedapidelemukoleg.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/164d60588a85a0fd914dd95265879447/5636055744.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcb2be80c1---49671426912.pdfIn PDF document text
    • http://pasaru.com/upload/files/xuluw.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/sowezaruzunukex.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bad93155183---pepizevedanivaji.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/jixukinikutivudixofa.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc7d16421---taxopurobimojulagelebate.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_off0000e7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F1 18716 bytes
SHA-256: 5af7b7ab486b389050e56c2dfa079f7102e3b3c189bc3418fc8198b33e721220
font_01_sfnt_off00011877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11877 10620 bytes
SHA-256: 5375850b4f94512ad6c8bf9de3f28ef8a5e6edec670fbc46fa2bfedc6646063d
font_02_sfnt_off000130b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1