Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4ab54ab1766233…

MALICIOUS

PDF

85.7 KB Created: 2021-07-02 22:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7ce9a67870a09b8c99acb6dc4b006258 SHA-1: 7476da3e93d33677391ce5f3e5eec3b7b4836929 SHA-256: 2e4ab54ab176623344c8c98e89858b7de81129d60eca5eee34ff301e0f95adab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress installations or disposable hosting. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/9f61a3f2db98f423c5ed43027cf03f71/83849185625.pdf In PDF document text
    • https://kisikana.hr/userfiles/file/valuwot.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/setovapiwepaxokuwuvebi.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/juzesesekexarewir.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/92c1a2baf9ea5812e73dc9f8567a79c7/raxawovose.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/51d9755a6b4b2acf8d6c69cbe03ea7e0/37464287028.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d1979576b---gozedasufatojazexapuk.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/vupuzoxebupivopomabakuvom.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16099d53ed8708---35804833345.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-11/20210511115604107997.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608eae415e693---daxak.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/84d9a44f97dd6f3fd5af01e64e20b489/50235563049.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/62e8343bf32dd0da9cf4020cdf25c53e/89819223949.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebf8bd3d3e---43021166942.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/20038c727628bd9706b492800b82aef7/zevumumifamulurudipa.pdfIn PDF document text
    • http://nprofit.hk/userfiles/72146953857.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/fupimij.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/70598951280.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/filanaxisekiw.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b297f01b54---97122983338.pdfIn PDF document text
    • https://vestol.bg/files/file/50590544688.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160702f946ecd3---29861462939.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/57d41af239e864e5d8ba232c5255b39e/46402595711.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/2b97ccc81f3558c3e6f700faef415f93/jawavizakamusi.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/fa6b6a43d138c9c4e2bd74843dcdaea7/73046863938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=places+to+buy+rats+near+mePDF 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_off0000e9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BF 10656 bytes
SHA-256: b7be58ccbf7b497e4a349342d92f45f35eb5801e9209583970e434c6f1a4a3c8
font_01_sfnt_off00010240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10240 18048 bytes
SHA-256: 84aa96478561c05678a9b71f8b1f2accf8a9b95a1758384b444b76eb1e17a1a0
font_02_sfnt_off000131aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1