Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba14165bfb23cec…

MALICIOUS

PDF

111.5 KB Created: 2021-07-21 23:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 25ef164cc7a1816615834d1d456293f5 SHA-1: e74ba4e6e0b3d1f30e98e7546fa7c9edf59aaa7e SHA-256: 2ba14165bfb23cec906cac45a22e13d8cb92aa3df06b1f0caa0722c1668e3e96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/b84b287ba6ace2bd3a6c2397a3acbf9a/towaxikeg.pdf In PDF document text
    • http://www.anjhimayath.com/upload/file/rutomepajedu.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/fc556546416f2d220d7ff315c26d59ce/sutenakozilixupusurajuw.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/10458829071.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/61a0da3a25f3916eae335d2a1030eb17/gomapavexudozenetoji.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/egqlb68pl302dekv52nq650563/rasigupotawevegawizolor.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/pr5a6mq7sk3421f4k8hvh0j8ti/34816359597.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c51b3f7ab75---jifagesegezoter.pdfIn PDF document text
    • https://x-software.cz/data/file/84748579775.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/mijejiwamuzededatapimob.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/311947102.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608739cd85539---88001813150.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6455bb9dd---90406278552.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/32337007932.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/muzujeferomopimuxeja.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/6b827d81543ca04e175a92d45cd60d3e/68737684085.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/guvanememudaboxosud.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ef2d69f4c---muvakedadativur.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210608_020842.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/98269497094.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee9b92ff72---83148357439.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/vodobugodereweluwajaw.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/danategizam.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/29864011638.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=flights+to+barbados+from+floridaPDF 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://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_off00014dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16611 18468 bytes
SHA-256: e2b0870e7ebeb5f2ca3be192252f6e218e6be98e6f3d90a7ba74f33a11d7c11d
font_02_sfnt_off000195e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195E6 10684 bytes
SHA-256: d35ee984653b113080e7c4e561089f48d0999f890059b0caad6bc9eaca4c0782

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