Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2e34f2a5ba726e…

MALICIOUS

PDF

89.4 KB Created: 2021-09-02 03:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9647449d42ab15986f8fad424d632719 SHA-1: fd3616d536be4343fb371213c12fcb6eace1b2b5 SHA-256: eb2e34f2a5ba726e528f91628f701e1314b57006322affb4455142c65b40a04c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm on compromised CMS upload storage suggests an attempt to obscure the true destination or leverage trusted domains for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://saltokisport.com/uploads/files/20109485552.pdf In PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a686d8afa98---nizumigebovodapigolubevof.pdfIn PDF document text
    • http://www.bash.cl/media/file/76779853866.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096d3308a563---tapalotonowanakurubasaxen.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/sinejitopos.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/zalegire.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/9f6cf77a9743d204ac690cfc8437c7d5/4506544540.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/navupufuzepewuv.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/lngjbj0i302clrsgvoa6gepo1v/bukiwififoz.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/2136075940.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/14239282059.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/kiluxotivak.pdfIn PDF document text
    • http://mamitobe.ru/files/file/gimimolajamato.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/sefeboji.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/19365769095.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/kasilareponofelorul.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160934ee97ea2e---73902528997.pdfIn PDF document text
    • http://charivne.info/images/file/48513582442.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/moguseme.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/zekumoriratedibazobi.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e459a39d2---surubefisogakabexujura.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/81fbb80d9e75398bb9ed1fe4f34bade3/veretoli.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/280e00a184a46f858b225953d6190e20/63036939407.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/2kne1vudmphttudjr69e7edkf5/xerizijigum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=the+temperament+and+character+inventoryPDF link annotation
    • 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_off0000f58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58E 18480 bytes
SHA-256: 488ab4c77830a75b84bf8215820045ac0d69a205b167d8335865dba72d7b6d73
font_01_sfnt_off000125f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E07 10708 bytes
SHA-256: bee889fb68a7b73e23623801955cb2fe01e1a00bb105d1470ba0916644e14952

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