Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50d4b4eb4931f60…

MALICIOUS

PDF

92.2 KB Created: 2021-09-04 21:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3695f5071efe0227604a0d228b56bbc6 SHA-1: a10284aaebfa2748236c015d8dc0e1053e86e20d SHA-256: d50d4b4eb4931f60d4cc59bd5ac0b0d0323d33285e7f4daee96688666483e264
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous links to external sites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://coretry.ru/uplcv?utm_term=armies+of+the+night+norman+mailer+pdf PDF link annotation
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2717e69b68---55438037482.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/b2c247c63cc017e0e4f5d79d6fa8f79b/58432552134.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffd66b2557d---38455172288.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/pigaw.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210821002907.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608459658d786---tojenoravepipodofeseri.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/83862476903.pdfIn PDF document text
    • http://osingenieria.com/images/admin/file/3139952186.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-30/20210630004429527531.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/xiverazexizunam.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/39592051364.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16102daca144c1---83031723487.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/mizuzefizabe.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/b09ef428222f991acaaeb94fd1f69720/65322180662.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/16478055224.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/magorupogotaninufu.pdfIn PDF document text
    • https://unitjaya.com/contents//files/mudusavelovewapefex.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/fekefidu.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160964a806ff40---numinub.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/kisiz.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e20584eee---tizogirikemizagevuw.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7703912f0---13908392168.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/i84475p8ijhcior6q28fbposaa/46468104126.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/22906236788.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/kunukibiwigilirijat.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_off00010263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A75 18396 bytes
SHA-256: 989aadd7546d82a1c59d8484d5a7d93382fdcbe04ff79ac0f8567bdfaf7697bf
font_02_sfnt_off000149d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D3 10928 bytes
SHA-256: 160fd1ca5d4fac84e86272cfaf14bd6267b040bb610543129d8b24a2883a9bd8

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