Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e946428aa6c9c5a…

MALICIOUS

PDF

85.3 KB Created: 2021-07-01 10:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 33f3cc3fedf686ec34b63a08c3e6994b SHA-1: a9ae5558bc2d43c767561ece59310e0d69670632 SHA-256: 1e946428aa6c9c5a849d72a4c201fe6c5b3f7ae1dd926ff22a1d83c1ac6ce8ef
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 pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://mosjob.ru/images/file/feriraxadez.pdf In PDF document text
    • https://armagedonspedycja.pl/files/file/fizexekakomibabipevofan.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/c063057ca7bd0244e520115d0085aa8a/79867080572.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce4360d12f---fezatatelutajojixedotiji.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608651e29b513---guzopokabonu.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/5knjlig5p5oq86q1a6co5m874q/jaxaparudob.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/buvumitififividopoxono.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/28528627754.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/xikodokuviwanodun.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/tatad.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/36475194321.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/b14af4e8c17e1e03b591c8908c54db34/76026384540.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/808108dc4d276865e0b526863d91d3df/nalaworekibaxujabaxelafe.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/rukaxe.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/75895712900.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/nagilowevigalatavipofofe.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc6b6f1dfe---xeragejebamosevi.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/3252baab6414ea9404814f946b81cda2/vewogo.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0422a4010---towotixepiwigagilabawa.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/xemogigofut.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/pabivotipiwofiwatif.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5b4927b48---29933515860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=is+whole+wheat+bread+goodPDF 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_off0000ea3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3A 10508 bytes
SHA-256: 92513006da8cd6825e9f03365f7ec1fac8e5d459547d1d892501930a444c6c70
font_01_sfnt_off00010227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10227 17416 bytes
SHA-256: 74eabbe741df431c0edfb2ee59aba30f090411c523f9fb2da7f6a736f89d7ae0
font_02_sfnt_off00012ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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