Malicious PDF — malware analysis report

Static analysis result for SHA-256 029d02fd7d3d2c3f…

MALICIOUS

PDF

83.9 KB Created: 2021-08-20 07:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e12a2a1f76946052cc6728449eb1b183 SHA-1: 220af94acb6ac939c70fccc7a20e35a11d030c2e SHA-256: 029d02fd7d3d2c3fe8b62bc015ead6e2840dec850a437d355443ff87ea70884e
154 Risk Score

Malware Insights

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

The PDF was identified as malicious by ClamAV and an ML classifier, and contains numerous embedded URLs. Several of these URLs point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The presence of these links suggests an attempt to lure users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8448

Heuristics 5

  • 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
  • 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://sumisaedu.com/FileData/ckfinder/files/20210722_49A026DE0F05A78D.pdf In PDF document text
    • http://freeski.hu/freeski/file/14407856460.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c9cec79ff---bokovetawanexisapujeb.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/bf454aee03c7b21261cacf603d5d2413/97657898178.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/531e2e637a57590b08f6fb1fc580a1d1/1017013244.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/5h30fk2eqa8v6k8rloasqkjgak/46508806452.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/28518260350.pdfIn PDF document text
    • https://kangaroovietuc.vn/webroot/img/files/jelesolisedoxudela.pdfIn PDF document text
    • http://kleni.cz/userfiles/file/kesagozemebisagumadojadem.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/liruzobaku.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/72611352486.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0624/a7eab491a8c1726fe19c127f97e27d27.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/6ca1997636c4ee383cc8b720a408d07a/43255769504.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/058e0e0f3a9a62e7625b3e4bd97351e9/waxovor.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/mlem53kohk4jbgmd27g3r7f6u3/vigidujidigamuketip.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f890b24c9db3798b3c3b3a256a3c833a/vekunivipenamefopepel.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/b7052d200c894584b4adf0d602bade7d/lotijidobomujab.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/h5fb53svkvo1b4j1kssqf3ttdq/55805549299.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/7d1316e6c09a5665b0434d4f6bb99a89/dobob.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/jupawovuvexodolezop.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/445519f5244831d9daeb85251356ee88/zisijuxawovoxulosox.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/c2sj5djjsa9tguna3krp08i1c1/14713314853.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/dkdul213hbcv963jmnemontp4t/83019621167.pdfIn PDF document text
    • https://drlanda.hu/user/file/47628585965.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=writing+and+balancing+chemical+equations+worksheet+%231+answersPDF link annotation
    • 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_off00010794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA6 16900 bytes
SHA-256: d940e209dedc26a3abe52fc9be7cbd4074cf58924f0b3dfdafce0984eb20ef58