Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e365dd89c04d9d3…

MALICIOUS

PDF

106.1 KB Created: 2021-08-18 14:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5da0e8444f791fa0e76dabdee522a2f2 SHA-1: 363300dd2a8f9075aadefb582338e4846eaa7597 SHA-256: 7e365dd89c04d9d3f37325269118d301d757bd12c0d522caf9472b475da9aac3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, including a link to 'ketchas.ru'. This pattern suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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://ketchas.ru/uplcv?utm_term=simple+past+tense+negative+sentences+examples+in+hindi PDF link annotation
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78243983286.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611141142028e---xikek.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a987a0d714---5506844393.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210618092409.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/53f8c005bfe0678fe14ad185f1f62125/fewepewigo.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f9631321b---rosefez.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/sijudolokele.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/32093622639.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/14cfba19e9c99db4d0ec12c510d72070/xujagarox.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/makubiwuferezeked.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/f1cb52a60bc93a6cef54d11d61ddcb48/82611289318.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/46451580421.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/afb33ff048bb58e22532217a78bca906/68363530824.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/08sinbviioq85cmuesfgrcblqp/32474632029.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97f280c7f0---73791971474.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/27000872642.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6d3d5ac60---nadazovijeruwemipix.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a74df5f1cd3---38221986527.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/pusamutirita.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/mafitizix.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72d41eb11d---50371641599.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/18300623850.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079fb4555c1c---10705370252.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/tejesivirir.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/9a2a914a7e163dba6f0af8abc835cf76/jegate.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/1432301451.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/422e37dd4f6a8a1b3766cce52e92e496/soxiw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0A 18736 bytes
SHA-256: ad3ea51d768af9f4c360c8aa4a196173bfd449c0d47a7991bd011c79e4aa44b4
font_02_sfnt_off00015c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C83 10984 bytes
SHA-256: 515d4193806741c4f67d2025aadb6fac0aa7075f873fa31df9aeb25748407877
font_03_sfnt_off0001759e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1759E 20440 bytes
SHA-256: 5318bce4e1756d38287bd6ef3932e969c6e5279f940b5ecc15c7c6bed65d73d3

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