Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e46a69c7acf17c…

MALICIOUS

PDF

86.3 KB Created: 2021-07-13 01:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ac611056f4e9be68ef613cd6029ab613 SHA-1: 010f3eba29773f98db686a15059c6396a99429a2 SHA-256: 54e46a69c7acf17c1ebb60af2cb2a20fe18917c25cc5f0f1b5c53474ee9eff9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites or disposable hosting. The presence of these links suggests an attempt to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=christmas+flowers+delivery PDF link annotation
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ub542ckm86sasulelkrajbqei6/48455946542.pdfIn PDF document text
    • http://sequoia59.com/clients/867919/File/39260223808.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/9b33fcd682c28d3cbb1153ab2c864455/23676747511.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/63011836607.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/36624848103.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160883f78bc8c4---24331435223.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/sefisosozapefesolu.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/2890abf4c1a61d7cf2b15f72a76e743b/76751366284.pdfIn PDF document text
    • http://wirheiraten.de/images/file/40326669162.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/13145834741.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/48539663069.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/pediwibujuwuko.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210620181842_98xhlv.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/600fd572c656e3af408a5fb04cb91ca0/32367886528.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098cfa3b440b---wabubexomufegotifaguke.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/86926810114.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/e6b251eaa72fd670d1e3d856ef187e3d/90614401553.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/77611045710.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/suzenerekiwatij.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607384ff90629---63362292237.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/2500483169.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/a524577463d6dceaf8a2aed87ab94b75/70389292325.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_off0000edfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001060f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060F 17172 bytes
SHA-256: 72334eda45dc724875146f77bc800dd80d40419f61c163c39f31426ccd64139a
font_02_sfnt_off0001331a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331A 10812 bytes
SHA-256: 0f902fcbeee4bffc27c265a61bf81cef456317d18b9c129aab2d77b8e4f6e499

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