Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7fe2ac1881a9d7b…

MALICIOUS

PDF

78.5 KB Created: 2021-09-16 00:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d98e8da4e39084117b86058262c5ff0b SHA-1: daf3ddba7760785976bbf2014b37dba63a737102 SHA-256: d7fe2ac1881a9d7b0e2b6bf91ae383db0aaee3a8304e164deaa4cd61cce52c1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pixomot.ru/uplcv?utm_term=the+punisher+season+2+episode+1+full+episode PDF link annotation
    • https://grnca.org/img/files/files/kiwiliburazenoxikokuno.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/57086271809.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/biwokega.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/furizezejazowak.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/94744866451.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109101827565870.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109100012556453.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d2d4591c3---fimisilusukexixosajilate.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f70a83047f---neluzafarovuvefonuru.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2e089cb48---10857579988.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/24646268113.pdfIn PDF document text
    • https://xtremefitksa.com/ckfinder/userfiles/files/lizidenuzasosurivufalet.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/gugenesiwugetadexukerox.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210916_000904.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/buwototazomisinu.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/61495127340.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/88910779910.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/14493702644.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161425ece95f3c---zodigulokepewamakivu.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c6dd2d1c158c127fc158fd72a39fae08/jabatinuzijuvazok.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f559d35135---zenibumopilujojogadomilo.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613166b1981f5---84025082896.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_off0000ccfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFE 18176 bytes
SHA-256: 665668a9000d3b93bdafb63c0320e164ea92995be0d36ff7401310764d2b6165
font_01_sfnt_off0000fbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 10732 bytes
SHA-256: 8469054bd36fce8a75823738e7314fe27258832cb922e6c55c31f4e801f86b1a
font_02_sfnt_off00011447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11447 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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