Malicious PDF — malware analysis report

Static analysis result for SHA-256 2182c28e94775224…

MALICIOUS

PDF

81.8 KB Created: 2021-09-08 06:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fbdb5eb3f18955ad0eb80a9ecf219ee3 SHA-1: 0d051030481c9695847b4ba32b2f59c5ac351d42 SHA-256: 2182c28e94775224b921d63265ebfa813da0b4f69e80f8a036d7c1ba4076c26d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The 'SE_INVOICE_LURE' heuristic indicates the document's content is likely a fake invoice or payment request to entice users to click these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://huntic.ru/uplcv?utm_term=work+out+square+root+manually PDF link annotation
    • http://atomleasing.ru/media/File/70788985198.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd8f56c0a---guwosurezoxopuxitevod.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/madijezexatosetoje.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/bscrbgcvi08q11rsm0nf8lnf9m/86519312270.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/87235139294.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/1934b4cae70c9aef7216bde9a8edd64d/60588175685.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/folusifixij.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/lusidujoninopunotiwibad.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/87237732950.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/b5f13c3162f79126a011af19a2969bef/60821265559.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609870c2495c4---wamadosizazirogunugewewer.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/4347bea4d868f9589210ac4a2fcbb664/zajefosasorovobupubexex.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/juropulojaj.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f76288b2e5---84892038885.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/88072c8b79daeeb7d3e492764a2eecd5/52618473777.pdfIn PDF document text
    • http://charontrade.hu/data/file/50985907046.pdfIn PDF document text
    • https://jagominum.com/contents//files/26156192002.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/ca239d2f9d4cc8c930aeff04611c6c6e/vesodowapadupotijegofin.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/94216719621.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/528ee62ed6b9367a73075688b37d1483/83060164238.pdfIn PDF document text
    • http://falerisztika.hu/tmp/8955167644.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-4-30/20210430153756719663.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/fowidivumejipegakolefi.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/80563762285.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_off0000dad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E8 17884 bytes
SHA-256: 3102cf40b1836b961d4079c6b8f813effef857344db99ee93f368c3b20b8b7ee
font_02_sfnt_off00012118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12118 10624 bytes
SHA-256: fad3cbdfd2fecd2ae511b602da65a7f6d7a5e53f555e9697c43bfa9f091849b5

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