Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b132e402fc8b37…

MALICIOUS

PDF

85.4 KB Created: 2021-09-13 17:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6975124aa8110ff7d708e064f67deb35 SHA-1: d751d77c3d714f1e615111655130621b237a7cad SHA-256: 60b132e402fc8b3751a010abe6a2d818347d3a59aac230cb9c98babb7d806c0f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://oniceh.ru/uplcv?utm_term=john+wick+chapter+2+stream PDF link annotation
    • https://peintures-descours.fr/fichier/files/jipotuluvure.pdfIn PDF document text
    • http://midoriku.zaitakunet.jp/app/webroot/upload_images/files/26581682145.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/49344d3ee580737ae9f59c81030cbc19/pokajuvusuwerevogox.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/68512478393.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/ca9b6e63a5180dfa59378491d2adbc68/zalajezunexikibikamute.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/33952659557.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/zidudasopojukofakefo.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/25800885759.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/nipufob.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/56527069137.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66005417688.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/vuzip.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/71106216454.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae66bb56e4---pifofaku.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161364dea16925---70345793674.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6873c9c8b---19178616974.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/jibivodusenutuxesi.pdfIn PDF document text
    • http://etepi.pt/js/ckfinder/userfiles/files/numobagifi.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/fojirijilu.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109041553207978.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/74826738579.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/91888540648.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/suzig.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_off0000e487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE487 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9E 10884 bytes
SHA-256: bc0eaf3d8e7577cc5c70b594c80473ed958c3c232871d9321782700cbe924273
font_02_sfnt_off000115c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C9 19316 bytes
SHA-256: 3bd8884953523fe9c7d691f690009c34c6c691afd5b6d0b3d5c63f69a01c3c4a

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