Malicious PDF — malware analysis report

Static analysis result for SHA-256 62361a62572f6a2a…

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 00:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b5afd1d46e83257645b7d27f84b8585d SHA-1: 82f18170ea4c61571e52af22b176dff9c031d184 SHA-256: 62361a62572f6a2a7d17732e99134871d1d2fd1e67a9e8441663e3ec30d81015
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic findings indicate the PDF acts as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. This suggests the primary goal is to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://garglob.ru/uplcv?utm_term=tropical+root+vegetables+list PDF link annotation
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133ed5dbf87e---40450383241.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/39110393206.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/logitewoxamebipuwepo.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/putomuwen.pdfIn PDF document text
    • https://everestart.com/images/stories/file/63497874682.pdfIn PDF document text
    • http://th-hl.com///upload/files/timizotedonuwijubivakoz.pdfIn PDF document text
    • https://campermagazine.tv/public/file/72422103771.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/69769225169.pdfIn PDF document text
    • https://mkontroll.hu/File/getebufekaxufizizewilobi.pdfIn PDF document text
    • http://balone.net/_upload/file///27099217715.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/16022243794.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/vuvoperokosuxolejexok.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/madolugerabejiditudimi.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613167bebc894---45471472790.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/69742608869.pdfIn PDF document text
    • http://youzedu.com/ckimages/files/20210918053747604602.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210914155443.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136635b06aa3---xokipawopipukupopazidej.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/gprsle3968q3nl7geapurkgi65/90119565048.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/22081238723.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/13002113213.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/buzugazojomikulax.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/rikebilesujus.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_off0000d374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD374 10616 bytes
SHA-256: f94391b8882d640453177d1a61ffcb61b22d6df12cdfb64192094ee42b02fa6d
font_01_sfnt_off0000eba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA5 18256 bytes
SHA-256: a947bb82e6dca0ad386442c06773676b46091787fbdc97217675a13851368816
font_02_sfnt_off00011b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1