Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e59ec80fd7e47bd…

MALICIOUS

PDF

80.8 KB Created: 2021-09-05 19:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0bda0dd16f8544f72513f2bd7dd017f1 SHA-1: afc61ae69df0695483fffe1ac1a111a904036dee SHA-256: 0e59ec80fd7e47bd3c7a49a6175d88577a8943ee971edd7196cc4e2c9bfa037b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to funnel users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://sealordhotels.com/ckfinder/userfiles/files/losigazukibizovit.pdf In PDF document text
    • http://craftland.de/res/wysiwyg/file/velavorivavo.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/15129800174.pdfIn PDF document text
    • https://goodline.by/userfiles/file/boroxujigixotolopabamazu.pdfIn PDF document text
    • http://kotolantopeni.cz/file/desisemugexosilixozukifal.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/2239fe782c1b5cc391ac02ce914ebcc8/wepekofuzalozinejelo.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/61956947031.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/salifuvizo.pdfIn PDF document text
    • https://hockeymro.ca/docs/file/11445661313.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/7390961821.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d10047f1ff---94233912053.pdfIn PDF document text
    • https://dintek.eu/uploads/file/49855692305.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d9493a51bbedaecc8502b0bc725ec208/ketolidojapokejorikuwadak.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/10526772369.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f2e703dfd2a---21193674227.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c42eeb8fce---61184114710.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be940787da3---18660709099.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c62f9e61f67---72038442903.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/53546091263.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/39558838634.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160edab5890f37---28276521935.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/5ee6189a3b452dd2773254780fd75aba/balivedezudo.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/giditilujaposexilewakap.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/a6nsj88gveht2c01tfqa1nq1mo/45071138554.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/zagiku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ca+final+registration+revalidation+form+pdfPDF 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_off0000d500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD500 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 18328 bytes
SHA-256: c1bf42503c1b22ffaa613c62c688db68ebd0d6376407f2ed250fa96d4bfa0b95
font_02_sfnt_off00011c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 10940 bytes
SHA-256: 731d75772b55ee7cd0b98e009d0e33abbf0f78c0ff614a31e1ae44119c7761cb