Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab66ccf962332ecf…

MALICIOUS

PDF

90.0 KB Created: 2021-07-29 18:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b7ecca1bd2d0baa0fc317bbf5facc37a SHA-1: d28107b21463915493652e49bf75f9fc483c137a SHA-256: ab66ccf962332ecf97545b1b9ae2c62f10d7b98fe453e33eec52860939fe04b5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Harvest Credentials

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The 'SE_MFA_LURE' heuristic indicates the document is likely a phishing attempt designed to harvest credentials or session tokens by impersonating a service that requires multi-factor authentication or one-time codes. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://infrive.ru/uplcv?utm_term=how+to+fill+out+form+6+acknowledgement+of+service PDF link annotation
    • http://cmtdental.com/upload/ckimg/files/vagutezazaxovaxab.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/guwasexa.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcc62cf46f---ninugipusobazapajex.pdfIn PDF document text
    • https://mmszke.hu/files/file/ruvimupedasugake.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/1648e8d31a415a6d7922e66370cddc2f/jiwifulagaganetepufatifi.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecd740b2bb---74951108667.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075baf83fa9b---lazopasoloruvezi.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fb9ced048e6---65330800203.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c02db317ae6---29485466630.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/69100236802.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/cba186579b98cf30c769dd8b214b49d6/mitazebetajimiwedofekifa.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/17278426691.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/8kfo6hq0qmdvstvuqt2iudra4f/25187313151.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/b2e4aee55de1b1b44887269111663858/47654245571.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/8438025815.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/lemunene.pdfIn PDF document text
    • http://darstin.com/userfiles/files/91762134131.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///waraturefosujow.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae643bb0ffb---34782411340.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/gopesuneg.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/zibipagejekin.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/59679165982.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/f611b239577bb26be5593e24055daaf8/58589767190.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_off0000f9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C9 11324 bytes
SHA-256: d74c5ab8509b3fdba4febd6ec35ebf6aa440e498cc9f88a0b3f4abd61a9285c0
font_02_sfnt_off00012c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3E 17652 bytes
SHA-256: 9f93313cf814654285768926fcaeeb4ad40287a5ccf6c3d70b29c2096b1b4822

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