Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2eaadbbcc82c4e9…

MALICIOUS

PDF

73.5 KB Created: 2021-09-06 21:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 978f28125924ff742c55eec6bc790a32 SHA-1: cc26e0de514289ca30fc786c92e66f01bf47b065 SHA-256: d2eaadbbcc82c4e93347863e583e9341967ad8dce49e82e522abb55cefde3802
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also features numerous external URIs, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=belgariad+pdf+free+download PDF link annotation
    • https://baongochoa.com/upload/file/dikologopititoganewokufe.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/78436175587.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9517f3418b---83214208740.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/feperakexoraxizo.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/ohmpfuv93ojh7i8mr343vq1su0/bopuligivesavojodil.pdfIn PDF document text
    • http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/xuzuzeja.pdfIn PDF document text
    • http://intergeored.com/upload/File/nenejemerefesulejejugewod.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/8ab5ded1dcd063abc54d1be4df1c7239/24274060570.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ade870d7a3b---66295943296.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096bb2caadc6---lunezudewipero.pdfIn PDF document text
    • http://naso10.com/userData/board/file/tupofobekadovoralixowo.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/lajenuwubafu.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/eec6b8b41ccd24987f0ff38286daf5c9/nusigeminodiz.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/30378715319.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/6gn089p11nnnvavt7ehvpk006v/43625994198.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/bukam.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/74834968174.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612872ac62e37---vemobid.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d86a8370b25---16252351731.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/22993524201.pdfIn PDF document text
    • http://djpress.pl/Image/files/59370095000.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/86887120048.pdfIn PDF document text
    • http://arslanemlak.come/file/tobejone.pdfIn PDF document text
    • http://esistore.be/userfiles/file/66508463598.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/peretikanimaliluse.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_off0000bde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE3 16440 bytes
SHA-256: 31dd609b468bd357ca2aac501c8645e586e8ea686bfc39bc24c78ba3dcd7431f
font_01_sfnt_off0000e866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE866 10544 bytes
SHA-256: a7c10e582e0a67796fa9b9ecd20eed709710a715c93249b373bf2a83c10498a8
font_02_sfnt_off0001005a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1