Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e58e4dc5f4aa77…

MALICIOUS

PDF

88.7 KB Created: 2021-06-13 01:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d062e5798c172dc79c2f697941209252 SHA-1: 2455b67a8403544dc5d0dfd99fc593f92a230cc2 SHA-256: 05e58e4dc5f4aa77b3973280784c4afed7a539607da81fc9eebd308933488c2c
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised websites, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple URLs hosted on potentially compromised CMS uploads indicate a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://oniceh.ru/uplcv?utm_term=pokemon+red+chapter+download PDF link annotation
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9d4f18530---91726420510.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/kbhrn1j81rjpdggpce6jjri52j/monuwapubibova.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb4a6f0946---sufefavebepo.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31ca52e16f---jikujajovepek.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/be94a0497e36b7bc11e1778677f2a199/3653118622.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/3e1e7c6d75ce1598d01626785c6394cb/62869070112.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/19d2e86ef1b9f08648fb9f4df3664fe0/dezunesamopasapisesitolo.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/de36bbfe267720a34c1112bebf68bf30/19238122298.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/21920845289.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/mu9p6no75tjpg4o4fi961epc0r/94656360282.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/24/file/20210524_214028_149.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf34a4c266---tifaroteluwefapowedimazu.pdfIn PDF document text
    • http://normel.org/files/upload/file/47239526097.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad03095b50---93136240295.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/zapogup.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/sv893b1lsr7tf4phlhajf04rj3/bujutomivumu.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160abce0b6f8f5---52709073099.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 5032 bytes
SHA-256: 85de8d07dab1affd034ebbdce2baa85d0001026852641fd340c16c7b2e0db6f1
font_01_sfnt_off0000fa62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA62 3648 bytes
SHA-256: 5deedea67faf4700ab2275527717dd9594bb2031fbccdd059991b7c4a78f5ca8
font_02_sfnt_off000107ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AD 12460 bytes
SHA-256: 94929604e32940dd7ddb93f39932185d6f95a246eaae9743bfccb0cab254da86
font_03_sfnt_off000130b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B7 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
font_04_sfnt_off00014520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14520 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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