Malicious PDF — malware analysis report

Static analysis result for SHA-256 153b2c100a980abf…

MALICIOUS

PDF

108.8 KB Created: 2021-06-15 20:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d2deac20e3394fef362dfdfbe6bbc4d3 SHA-1: caea4c3a08c4f423b8801e8e58b0a313395c8abd SHA-256: 153b2c100a980abf4d565cd665f3ced37dc5766864a37d02a6bffe7a0cb5b80a
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 0.9995

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://chcial.ru/uplcv?utm_term=lust+caution+full+movie+123movies PDF link annotation
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f06bb28e06---46265681490.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/7c51c8dd890554bee6f533dbe1bda9a1/53788187129.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/o7thg376l8dibbmkmo7isccr7k/murawutasafuzukudu.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/23205603965.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffbea6d2a1---xezipasitadagefobu.pdfIn PDF document text
    • http://firegallery.ru/img/upload/49561464916.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a13d9e2c442---xarotoregi.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/6129214375468408f4aa48e5c1b6c700/19534762802.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/5f6de227c567ae1db7859fda3514ceab/mogajodelizi.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075e838ecf69---zesezogotugeletobupasila.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/87873359947.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806ebc5b0c4---57667613897.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/27524483130.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ced9129f1---tawatakomav.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16096d964af59e---ririkojuxukomilikawapax.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/1c981d60b88c2b303c2fa39dcb8209f8/27083188693.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a49a597031---91763502592.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c43c5d538b---88603011888.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/zomusixazo.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_off000120bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BC 16780 bytes
SHA-256: 6e4238c6b92a388c5a3f1982f5e00e8e71c428272d689e3a71671c12e24918e7
font_01_sfnt_off000155ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155EA 5280 bytes
SHA-256: b9bc60155cf1fa8e3ec0f85515fdd9d5e1e714dd422c315b05d7a8c8ce527f4e
font_02_sfnt_off000167e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167E8 11976 bytes
SHA-256: 806acbf7526b58e31757269db46cca9c0fa0517a64ebb18ac051d735b4a9fa5a
font_03_sfnt_off00019094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19094 16060 bytes
SHA-256: 73f6f760a67782f27700c3ed047511a210a1e3765a9cc4fd416c63ff6a2522af

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