Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb42a3ed85843abd…

MALICIOUS

PDF

79.7 KB Created: 2021-07-04 16:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eabca5293bfdf3c634a36490db32e2d5 SHA-1: 2f3b194eaa4dce1073f59bf61279c0df5948f892 SHA-256: eb42a3ed85843abdef8e6d1a93fc12658c6f9d86294b7c504617084fa375fd65
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and exhibits characteristics of a link farm, directing users to multiple compromised WordPress upload directories and other disposable hosting sites. The embedded URLs suggest an attempt to lure users to phishing or malware distribution sites. No scripts were extracted from this sample, but the structure and URL patterns are indicative of a phishing or content-luring campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

Heuristics 5

  • 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
  • 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://ketchas.ru/uplcv?utm_term=define+rotation+and+revolution+in+short+answer PDF link annotation
    • https://bikidi.com/UpFiles/WebEditorFiles/file/kepozuxaporixegokosebipa.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/57034205322.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f3794f71b---zunozipemebamufoniw.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/a4fe7cd163c11a0afdb2302cdbd74800/pubetizob.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb5f756cd7---4616046994.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/cl6o1fu6rcnon9s82aor79ehva/japekamexogewokutabimiv.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cee3b393cc0---52732021765.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/86400421686.pdfIn PDF document text
    • https://arerp.kr/data/file///32661931765.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d8b637a4c3e---dulojoxuw.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/85469714991.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e805f5c5d0---luborupisamidejafidibufof.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad174ad456---moxaxomepogomakov.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/3143a8c5e4c235c743c8564de5d70be9/fuzosivawujaboxivoborip.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/bewig.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/m9q7nttrmor7ie46ahfa5s5aq1/fuzibowovitagalidat.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d01976abb---78889089673.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/juvogalif.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088655516bdc---ganetosixakemorig.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/90ebaff563c6a83576387446577dd3f5/moletufatanokogojorukada.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f484b2804---2562450412.pdfIn PDF document text
    • http://minicabii.com/survey/userfiles/files/90490040939.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988736327e9---kigukomubutumotixiwosova.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/vumunonuren.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10514 10704 bytes
SHA-256: 39657abff0fa90f772c1dab4c6dfa0c6e0c7bde8c5fd68b110e066eee610143e
font_01_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1