Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce469cfe6d323bcd…

MALICIOUS

PDF

101.5 KB Created: 2021-07-21 10:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 33c53d86d711e98edbf0a7ffcb454448 SHA-1: b7c50589118fe1523f3f04925e63b3567f0e83ba SHA-256: ce469cfe6d323bcdcc07ec378b8b89f3a3ac41604b0680285dad446e3c3abbae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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 http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff5495ce14---24059848005.pdf In PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/33757054147.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/zufima.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/winuzakafurisekubamoj.pdfIn PDF document text
    • https://eucolait.be/userfiles/files/bumufozodit.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/zunebekaseribevosi.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d188c4a52d---leguguwilemenerupijelole.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1e201c726---kimanenufiligemiliwube.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/janolikosidonofozega.pdfIn PDF document text
    • http://lucann.com/Upload/file/sedinixonefekunig.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dd9ebf5114a---5671305475.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d323ac1a9---gavasusubofapuxepuviwuw.pdfIn PDF document text
    • https://akemi.ro/hirek/file/7314642953.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b778c2a2070---37343246354.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072b3bb6f131---wigemenizaviwixuzi.pdfIn PDF document text
    • https://baongochoa.com/upload/file/norepazirinu.pdfIn PDF document text
    • http://rinsacars.com/files/others/31588378760.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/32028015299.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/nuviri.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/56735873488.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/c92f4037128c9883dd7aab2ca95aef10/mezuzibosiduwegoweruf.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/68763857aaba5207c5cff35d90cb33ff/gusagefatovijup.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fefbb5cb0d---zifatubaladej.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/2c02700c914082b39ff79d196ec9f162/47309728769.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1ed9e0fc9---25171947642.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6cf559704---85686831187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=flights+to+westchester+countyPDF link annotation
    • 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_off00012922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12922 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14139 10624 bytes
SHA-256: 6675264fb8213e8a992abefdf26619e3329682d6b60fbab358516b25755ee0a6
font_02_sfnt_off0001598b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1598B 17712 bytes
SHA-256: 0e0057d9bca90debf0f391b1bd97f6919ed87b629f4d1f08ad66de7c5c648cef