Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c699b54dcccc03…

MALICIOUS

PDF

87.6 KB Created: 2021-09-01 20:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 23017b35fef8ba966bb4cb718226efc4 SHA-1: 2cfe56c13e91905b18750d6214c91bc24474292f SHA-256: 22c699b54dcccc032de61245136295d8273aa21f5b97868985e44aae680e4dd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs that point to compromised WordPress installations. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://archism.ru/uplcv?utm_term=thermotron+2800+user+manual PDF link annotation
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff8ede1147---56697349913.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/fututijogid.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/8e0f2e603d81190eda6fe3a5f4a55252/9174106247.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e68b9db397---wizanepe.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/46400321053.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/5699926830.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/nptgkli726tq9el10lq8rm9jq1/manulovalemefamorov.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-07-10/images/files/bopunasaleruzeniv.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee5be2692f---32053385134.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/22498718990.pdfIn PDF document text
    • http://merwepizza.com/upload/file/purefakezim.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/71432444003.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/delovupataxazuwe.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e62192af35d---84290321215.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad18d717474---kepejizokowapusus.pdfIn PDF document text
    • http://synphabase.ch/upload/file/12524310358.pdfIn PDF document text
    • http://www.moyekolodin.com/files/fajowupumo.pdfIn PDF document text
    • http://kovospm.cz/fotky/file/jubelixijoj.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/vugedudaramizimetado.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/1q2agd6esrfntaerq6h3acnj44/badudegaselewemof.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/tufikupojivu.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/pafinakudesemajuzutibeki.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/14268815218.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077274078c14---fegadefubalidanevi.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_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 18092 bytes
SHA-256: 40f3d2fdcf367a7f8d4724f44acc177e740d1e17b2e51b81bfbf563bea6d2463
font_02_sfnt_off00013711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13711 10792 bytes
SHA-256: d61f7e2170b1e86e1ecf4eaf9c0c631391528789c49e99fc92564fbc05a414e3

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