Malicious PDF — malware analysis report

Static analysis result for SHA-256 0200b42feb208186…

MALICIOUS

PDF

120.7 KB Created: 2021-06-22 12:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 712ae5cb45e0dd1a5c8c0aad1a74fb6d SHA-1: 6140a0a14c7862228f441b8d322f613da5e8d89b SHA-256: 0200b42feb20818627166530d4566d1393a24eba6b0ba087eb994d30ebe5768e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://marosme.ro/hirek/file/sujaj.pdf In PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/9a5e06f19fec5ea52c2759b5f1b89ca7/sizeraxibavowo.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/tagusirupezawuloxolani.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1b77474c---dizuwixurejimozukurupi.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725e3b048b7---27773028561.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/21588802556.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a118c07be1d---2852766405.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c204a12eb1---22140064932.pdfIn PDF document text
    • https://wrd13.com/force/file/wovozemomutunis.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/1d9qj2nasrebes9vrvor9htbsd/bizunoxapububunep.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/4560666271.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16084520f5c8df---faparunabov.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160849acc366b0---8453270090.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16071bd213a071---79827239162.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/e6b9666630a7294cff969edfc1bc0f01/gojad.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/31310942526.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094260e9d498---41021400153.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=translate+english+to+krioPDF 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://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_off00016695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16695 3304 bytes
SHA-256: c75126a39a50df69418b05dfa10a18a97bb933c1bbd7483ac83f2039215dd3aa
font_01_sfnt_off00017275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17275 4960 bytes
SHA-256: 9cfa1a5ed067b54843308d8fa1990d6e3aea73b65e22edc29f73b0cf36575ad5
font_02_sfnt_off00018349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18349 16976 bytes
SHA-256: af7a0624fb4d18fe5699e55d65d5010bfe6b0f844a8ddf3723b100495a67967f
font_03_sfnt_off0001b5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5E5 19448 bytes
SHA-256: cdf69478b3fe1eabe8e95248878231e73ba4fc8b39f5e52e8acacbb0af5783a9

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