Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcda6ad91c3eeb8…

MALICIOUS

PDF

83.0 KB Created: 2021-07-02 00:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7212ae4cbd051b880e813f83de6f9df8 SHA-1: 2a3f4b48185053d408316b35abb9805f74e1c5fc SHA-256: 5fcda6ad91c3eeb80e28c4aff98ce9c1df629259ae27cd46133627f15d98064f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content or downloads. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://irlanc.ru/uplcv?utm_term=bank+exam+study+material+free+download+pdf PDF link annotation
    • https://artasedanasingaraja.com/uploadfck/file/24367616482.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5c2fe70ef---gugidasedijerovevi.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/rarovus.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/volegomebunupuzalewo.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/30156896570.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/roxodufamib.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd6087bdd---12879025971.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/74432678558.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/ruzutomu.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/34900175653.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2a537c8e5---nevepanutolowaj.pdfPDF link annotation
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/86ce53800b536d94f20e8caa9312091c/61297225535.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/0fav68l60lr3aqbu101a175aa6/sokimikininerefiboleka.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/1a65312ff2bf4c8a61d2e6d2af4e911e/5214398472.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee74942696---kupemegite.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/56740141814.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6569a300e---lokixunevasusirijilusa.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/10210187598.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/90876575697.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160891747d622f---58297592634.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/40428564326.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/16039102260.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b9b75b6fb064f64f7c2571b78323cfdd/xuvuj.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_off0000e091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE091 16808 bytes
SHA-256: 0b8cc49905cecd006eb145ba205e9e848d8687dab6f242b6a8a5a0314362c532
font_01_sfnt_off00010c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6B 11204 bytes
SHA-256: 5ed2fab66185faa0e402bfd41152db73c0129c8e383e5a1bfaaea1ddbc6ad1a7
font_02_sfnt_off000126bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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