Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fdf9fde6603762…

MALICIOUS

PDF

79.0 KB Created: 2021-09-07 02:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 89dc85f85bfb6dad8a0da5b83b78ddd4 SHA-1: fc00832fa1df52890cae1f3e70e09dadbdd3d87e SHA-256: 49fdf9fde66037627288e88b7660354dc39a1f90d5eba74c945b33e7f17c0071
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 https://philabc.ru/uplcv?utm_term=xor+and+xnor+gate+pdf PDF link annotation
    • http://urbanconstructions.org/images/uploadedimages/file/76784971073.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/dusapinatejozapanel.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16077560f32a4e---10691474114.pdfIn PDF document text
    • https://elektrona.cz/files/file/10810345995.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/4429d8fbe82e13eabdf6320a3efc967f/widanopux.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/bevitebabinofe.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c34eb6239---feketagolonedagimazit.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/sisedesutu.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc57b87e71---vegefewuxupeni.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0990212d5---56485121696.pdfIn PDF document text
    • http://360global.ca/userfiles/file/39280647143.pdfIn PDF document text
    • http://salt17.com/userfiles/files/47671982881.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4787cfb6a---mowevuzire.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/wexurabonerafeko.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/74322945518.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/fowubutesasedebu.pdfIn PDF document text
    • https://ms01bet.com/contents//files/2566554913.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9b8dad013---tiwutuxuxobuma.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/69681720554.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092b34c9f38e---rojajapejuruwiz.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/432fc74e3905c792fce1e0ce5e597f6b/wojosewoli.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/44f14d1d3b337f2c2411d4fb5d5c3e1a/6799503943.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/3f6cd978fb7a9bca2e47696c6e7fc653/63199599216.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_off0000d3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E2 16792 bytes
SHA-256: 2fb45a2998de6ff4166aeaa8d04831e8ec1a6add2b0e180674cde126495d5721
font_01_sfnt_off0000ff59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 10476 bytes
SHA-256: 5cd69ddf52c7598829e398f392b0a109ab304ddfbf309267e87619afc0c0e23a
font_02_sfnt_off00011707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11707 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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