Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30eeec91e817e5e…

MALICIOUS

PDF

79.8 KB Created: 2021-09-02 22:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 10b22d20bbdb770ce41db63d8ef2f173 SHA-1: e18a40c7d8532ab08d8ae52dfa9561c74825e412 SHA-256: d30eeec91e817e5ef05da0f1784e48996348564ae7fd608c6ef394ebf4a4c7a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The file's structure indicates it's a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=little+david+ldx-rtb+manual PDF link annotation
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160831a1cc8e83---49229440219.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607165cb2647c---taxegokorokinewotaje.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e67da60142---lonus.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/zilivediripunibelulod.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c70e289f6c2---fojuluxeru.pdfIn PDF document text
    • http://www.bash.cl/media/file/15725697247.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/26458579761.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/55235164859.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/d489d1729fbbbc2b120846d7c838eed5/bufegelebasitigun.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/kurogufukaxosejudifizetov.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/xakogebu.pdfIn PDF document text
    • http://thegioinoithatcamranh.com/media/ftp/file/91922953274.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d8561c70a---saxugulup.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160966fb9c1fb4---98270101229.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/vebijowarasaxitoz.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/nokesiminerikugukedaxato.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210809_A35458FC9F84268D.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609da10fe3560---76825900021.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16093e5b7c5c31---linojatewif.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/26599125766.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/jisufenixewirebonanugedik.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4803a165e---sisotego.pdfIn PDF document text
    • http://praguetransfer.com/files/file/bapejaturawujo.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/vudaw.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_off0000d3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BB 10520 bytes
SHA-256: 01f3c6b3d40cf54a4b3c8602527e7a87b63b5a97324c5c6afe45e4dbc1c91f5f
font_01_sfnt_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BE 17740 bytes
SHA-256: 60b467a03b8ed874e7f23543b9235ff2e9e888bb13fb125171ec1d68543194b2

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