Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7f7587b5e45a43…

MALICIOUS

PDF

78.1 KB Created: 2021-07-05 04:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 726fc8988e97ef05a7eb19632a1b86c9 SHA-1: 8293437731168e668e98004295a03bf112c4906b SHA-256: 4b7f7587b5e45a43d722c2c85432d7cb9e354a1e5e411abf578a75a7a343fe0a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the nature of the hosting indicate an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4578

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://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b44faa69729---pinapinekigipo.pdf In PDF document text
    • http://bungefamily.com/clients/5233/File/13217835799.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c259ae9cb84---mogujuperituwore.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab67e4a8857---bukalelabe.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/f57850acead4660794b194b2ae854150/30277068603.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c476188cd7f---bixumumuwefuruvajovataz.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/ginireliwisepi.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/sabetulitopimiwe.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb81325793f---82068877822.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/baxijolopakinumok.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160848608e9d5a---44394025810.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8c36b9b8---xewafefisul.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/sawipajerajukojew.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/ea64e43cf002e1f5a3281ef96ae9ea63/leroratuzurobutezafu.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/552416183.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/38386527878.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/bitilobopiro.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/girobogowolamuluzudaxe.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc594a75a8---7334001619.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/58aca154eec93c74ea75d92c6889d7fb/90800875905.pdfIn PDF document text
    • https://abeess.com/userfiles/file/buverixuxizegofebeso.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076027030c12---96858483228.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/cebe365f91b59c48c316a2bc4331b3f5/85979934404.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/78207695022.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=blood+and+bone+full+movie+watch+onlinePDF 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_off0000e3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B5 17000 bytes
SHA-256: e181a7c0725473583656f597af022515d199b5391e931c270400ba622cf64958
font_01_sfnt_off00010fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 10916 bytes
SHA-256: fbc5cf5f2cce4a66c085757106b3ded5a34dd0ba3b897166914a7f8d717a718f