Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce012517c004b2de…

MALICIOUS

PDF

86.9 KB Created: 2021-09-20 22:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 7b5111a32af70c17b76b5b282eb0e000 SHA-1: 21526f198625cf1918d1a505f6b02fbb09dd85fe SHA-256: ce012517c004b2dee3802dbdc14c1a916de6f286a932ce8d6c27f738f501fb7f
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm. The PDF contains numerous URLs pointing to potentially compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of 'utm_term' in one URL further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=fifty+shades+read+online PDF link annotation
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1614446ebef9a6---26980440745.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/70375258987.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/10058296360.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/limekeguwuxed.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/67367391086.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/wovaludusuvi.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/56646022244.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/69623304179.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/katatiwujenudufesevukuv.pdfIn PDF document text
    • http://michael-dhom.com/webseiten/file/84534200397.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/92366229172.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/disigositivoramiduvulezoj.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/tujoxivulototamopakifani.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/78694674313.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/40451561001.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/44072296311.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/40260084435.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/joramabigopikisiz.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161480b5ccb230---42359235355.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/jozafigorosin.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161457cbcdcc28---3298413480.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/37524935007.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/17414629135.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/dalejewogivokuf.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613765ea23b98---rizametoze.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_off0000ec92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 18848 bytes
SHA-256: b18fd0f8e2c795fa4c7a4a7677f3f4ad7d5a5ded8f6c8c279da17310d46aa3e3
font_02_sfnt_off000135d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D1 10544 bytes
SHA-256: 71d778539c5c1d7db7314401c019ca4d161b59a71b4df8176503837ecd377361