Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee12a460baad0db…

MALICIOUS

PDF

77.1 KB Created: 2021-09-06 11:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 398d7fd23c908915afd1855531753e2f SHA-1: 144b4cfa0dee53670c697c39415240a7db52155f SHA-256: 0ee12a460baad0db503ae6a74bede79059bfd3e086161ecf4b21e8e207539cb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external URIs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to leverage these compromised sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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=cabeza+de+turco+pdf PDF link annotation
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3577315dd---72750366684.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/443bf70e384dc1b158c29111f01d957d/lawigoxuliwazinu.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/e6rdrafp7h4irijdfkc91osq0t/58040859874.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/84cc0e75c1249fe55f0712ff6276e88c/98930246112.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/bemun.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/jawolos.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/06/29/file/20210629_060846_124.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/59302590400.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/38416343804.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20217121781078.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/ns0c2uvevn1lhihk9qt7rnt79h/60771541583.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160fe8d879b4c2---gagopojo.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/safevepajot.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/ginabijufopajivagiwuwowuf.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/49708655264.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15ccf3f815---42957584455.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/14314233578.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/04e80913ec13e3c346d4306028ee9918/xipubijodetorikefoguginam.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/55446965201.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5485b8433---palerabu.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8e2dc4e78bca04d7a59141da13fd140f/66576878707.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/b61299b2b441d226cb9e61039ef4ce5c/83079583446.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16128ab839c887---lebizejuwadaxa.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac5298fd2b---42542603176.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8badefe5b---71908950959.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f23aa335a---22376493911.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63B 19100 bytes
SHA-256: 7248d51f2f4421fee0917dd60230a9084d1d27091840cd9adf5c8eb4580cedad
font_01_sfnt_off0000f6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D5 10532 bytes
SHA-256: 97364db7aae023b38ecf51cfc22bdc9426d67f21845699997692132433a8234c
font_02_sfnt_off00010ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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