Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9605224108286f…

MALICIOUS

PDF

241.3 KB Created: 2021-06-25 08:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 418278fcf391e55fef7582dc3b9eac30 SHA-1: 93ee9e17a907f6a9298ea482669ee6faf445d75c SHA-256: 1f9605224108286f8a7654f3f364595ae6e3ad537ed8c832a3da4202c6b747ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains numerous links to compromised WordPress sites, suggesting it's part of a campaign to redirect users to malicious content. The embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9802

Heuristics 5

  • 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.
  • 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://queure.ru/uplcv?utm_term=aimsweb+maze+passages+pdf PDF link annotation
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bf680efd0---11009737168.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/c5h49qfv89e9nheduqdsrb6j31/37688273237.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/56nif1inf66j2sk8e1vra8ckii/rujagewakajirexaradebipi.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a675c18aecb---43198359465.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c230abdadf0---kojolil.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/70744778907.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a677846463c---33523293897.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/06/17/mujofosawasib.pdfIn PDF document text
    • http://thedreams.cz/files/90999992132.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751cfb114c8---60139588800.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20215311012458078.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/b93a775cb88cddd507c53915f86a5904/juxigumidolawefel.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/d757bed0dbb1dfe33766c896ff3839c2/bosafotabu.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/tofezejibujepenu.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0de59e5f7---75443312862.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210621223912.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0003476b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3476B 5504 bytes
SHA-256: c8752da49c6b801740a963441fa34fdb61d07fbbae2715867286353c7856283e
font_01_sfnt_off00035a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35A26 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000362b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x362B4 20764 bytes
SHA-256: 8fdb7623faf5d851d69581d569b334540dfd4a3a6292a9dfeef52b736f2690ce
font_03_sfnt_off00039fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39FEF 16660 bytes
SHA-256: 1bef4f72345e0ce2876cefb4b25cc7aab2cae47a172854cd258bc05d305f53a1

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