Malicious PDF — malware analysis report

Static analysis result for SHA-256 1158b2e3eef22664…

MALICIOUS

PDF

69.3 KB Created: 2021-09-03 08:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6d59e907d0a383d0ee0f83c0a7b52c64 SHA-1: 0af63d79bfb6b6a45c421447b0e7360e6ca28a1e SHA-256: 1158b2e3eef2266402ca0a032e84a51b92a3f39e105c8d5b13b2d682fba37832
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6569

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 http://ankamet.com/userfiles/file/88073527829.pdf In PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/6mpns1tkqej54b3armkuovn3gs/wusemubijuzemefadulemuj.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d688fda6313c01f604fb7ce1cef70066/30756006581.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/51762342774.pdfIn PDF document text
    • http://klccpa.com/userfiles/file/jodisurunididiz.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/rumelinu.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/49145091252.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/4tkstuqec5ikbnh7gfj3h1hjj5/fujebo.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b38acb5c9fa---93946428971.pdfIn PDF document text
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/sulavedezemediru.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/qrdk056fmaqfqfm9c7pbvpsas7/50498006739.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608be2ce9a459---33977222599.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e124da28c0---22791325795.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/7c1da264100432e29852d1a7832afe6e/22420384204.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160876d2898cdf---radutapadozowofilakaka.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606febf927b4d---49758498798.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/91496924180.pdfIn PDF document text
    • http://www.bsa.by/ckfinder/userfiles/files/18325811154.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles/file/91198351758.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/wipewigikugozimoxufenoxuv.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0a5151c896---tuguwijajawivutoxowe.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/xosigakapusigirojakut.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe3ba26a3c---88452736211.pdfIn PDF document text
    • http://dalaichau.com/files/kapumosufofedimo.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/zoxurugusibetonuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=rheumatoid+factor+test+procedure+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A7 17800 bytes
SHA-256: 942f96e98446dc7360b8c2d952ba2bdcfeab40ab407348fa39fd279d86710517