Malicious PDF — malware analysis report

Static analysis result for SHA-256 2005fc768d99a22d…

MALICIOUS

PDF

101.6 KB Created: 2021-07-20 00:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 963e4ca416c3c91faa2f49176085a4fe SHA-1: 082217fea8ab2732c5ccdade0be7b407e628397c SHA-256: 2005fc768d99a22dfe2fe916e49ef8fe9193892b95cabba4de13c4f9f3cfb7fa
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed for SEO manipulation or to distribute further malicious content. The presence of these links and the overall detection indicate a likely attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://resonanceacteurs.nl/userfiles/file/56899921690.pdf In PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a0bd2c696---sisomepotoxoteduwaxa.pdfIn PDF document text
    • http://edison76.com/clients/5/54/54c13950cbd15a81e6fb4362eab8f273/File/15636517538.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/mufefukij.pdfIn PDF document text
    • http://93564497.com/userfiles/26741396714.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160866241e9398---41973189652.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/69773060417.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/52d684e7de8f20a5df932bad7b2c923d/81728954505.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/2fc563bc38d1b645a967ecfd3c433a47/13096512357.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/xetaxijipinev.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/xusunizum.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/effbfbb29c23f8a981d57857ab246a3f/21758103195.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/67994218263.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/3b103e4a90b6a462b6b010a2dbca15c0/fatevuje.pdfIn PDF document text
    • https://majubesar.net/contents//files/watilejapolewe.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/22852802688.pdfIn PDF document text
    • http://promador.pl/userfiles/file/59214733687.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/banedirelabadazi.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/81602566613.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/bedewozeduraxaluramok.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/52093338189.pdfIn PDF document text
    • http://splogservice.ru/content/file/gixedevu.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/11203251785.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ichgdcqho7dsr82rdci6c1jvt0/bifefexurekikusonut.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/57093825838.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/danejagabumotaxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+charismatic+charlie+wade+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_off00012ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA4 10708 bytes
SHA-256: 93f4d8af60290ee83603fe6597dbf11f5ad47f8a2ca5a126383728ed54e3aafb
font_01_sfnt_off0001444c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1444C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C5E 17156 bytes
SHA-256: 75fb4a098a91a9522ad1ea3273e983d826024ba73928e51a6794e00248702549

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