Malicious PDF — malware analysis report

Static analysis result for SHA-256 832d89d04df5496e…

MALICIOUS

PDF

90.2 KB Created: 2021-06-27 20:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20319b26d029ca7a5b947353543b6ca4 SHA-1: 23b03f957998b7e522e166b41b3d9ffa554066a0 SHA-256: 832d89d04df5496e13794942edd2d32d054873e64bcabc3f7272e7d84833b7a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to compromised CMS upload storage, likely to distribute further malicious content. The presence of numerous unknown URLs hosted on various domains suggests a broad phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc11a88a1---noxumogin.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16085cdd40134c---dekogifataluvofifife.pdf
    • https://menu2uplus.com/images/file/45042356278.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/b9fcbce08ab3b5a1c151abc1b257296f/xolilutek.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7c77433f2---fojotawelawudi.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/bb642ce341eff19ece7ff5902de4f9c3/27439363066.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f056d9b4e45a21ccc365a90aeafaa6fa/dosudakogibavutegakuwe.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5bb5d10e5---lajagok.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a29cafd506e---69672037191.pdf
    • http://alibabashipping.com/userfiles/file/muxasotuwivifeguwakazax.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/dfe8dfe7c18f2e726f76c72ed6027a46/28146399432.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d453ee1009---lewexezateduzesugekugipiw.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/bfac92dcf0b42fdcaa4131003a723ef8/kefesinagono.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072652f502e4---rarogi.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/80e901cb313607e2b5b78ca30e093009/zekuxefog.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/6eb4e11216e6af740e55c1d37c9f192c/tipuvuruvatuxagamatejot.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b53ca32c93---32781372550.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160afda0dcbe2b---jumafuzobop.pdf
    • http://ksnjl.com/userfiles/files/xizubugigupokinot.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096df5778f58---86092825901.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/q3319d8lrjcb71i9og8onvdnh8/debetin.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/92a06b464ca0a6d86c605f3601256970/povejag.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60f4953f88---xulefidamexoko.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/3c3d2352168d490ec88264c82811d65e/73169326590.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608044f750bcb---begikadezubumozu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=grief+and+guilt
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff1d.bin
1a239b6713e23ccf5c316e1ed1324c3165f4e6024b8387cde8af867b54ebef65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1D 17272 bytes
font_01_sfnt_off00012c99.bin
b35d961081993ee53bb7711277b9370f3b463da9d96b8c9f93b89d58d9f5649f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C99 10380 bytes
font_02_sfnt_off000143f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143F3 16792 bytes

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