Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d15e22ef2db551…

MALICIOUS

PDF

86.0 KB Created: 2021-07-08 01:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b410f5ccf1c0bbdf80fad0d2c278e2dc SHA-1: 62923ee137fe6e8e9a6642fca736b3df430f0227 SHA-256: 74d15e22ef2db5516d5fe13e71f893e7492374a57d9d8c1864ebedd197381189
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3de36ec57826202a054c40c4ac9009d5/minumonu.pdf In PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/mlc4tptqa2ueesvh8np9iv4jop/38022561832.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/desunonu.pdfIn PDF document text
    • https://capecoralliving.com/media/file/26256587632.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccf96326ba---rexivajezan.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c92615f07aa---12874726256.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da18891fdc---36443492214.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/83018759371.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160960089210f8---tukasubifex.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608501827aa31---98253358436.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1621224937.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/bubijuviwujijikobulix.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/k0top9h7b21vfhnl2ivfms8pq7/69425612432.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab99b4ef2ae---woxiv.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/46028682073.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/tumegozuwekuditamarikogu.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/15542370567.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/5fe245a7e5d40f537049a58ea9d82883/risasizojozozituwurizut.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/60abd15196de0972d865201836779acd/xinodon.pdfIn PDF document text
    • http://turatabor.hu/media/pazaxaxanuxat.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607eab609fad5---nudinotumagiliwerilomapoj.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/oetar7shi1s87gf9q2ipod1tj5/kudidoromusepuf.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/6cc234537a3fbe797ebf5d8aa4dce3e5/31128672743.pdfIn PDF document text
    • http://tencanpowder.com/d/files/nubis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=connect+airpods+pro+to+androidPDF 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_off0000ecd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 18004 bytes
SHA-256: 06f054ac371a68917ed76d4151674d9f85f6365a68755f7a122f8300254a551c
font_01_sfnt_off00011ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB8 10492 bytes
SHA-256: 93b077f4a969ebc57ac3c50cee0d831c5048ae01840bddaa0c98fbdd57f7435e
font_02_sfnt_off000132bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1