Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50d3269652090e7…

MALICIOUS

PDF

76.2 KB Created: 2021-07-30 08:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e9e7b29ff48952ee43febcc7cf2f8109 SHA-1: fca7a22d6cf7679bef0352006dfa90572ade23bd SHA-256: e50d3269652090e7b2b045a964624aec3d4fe8b0586bd07e6f610f9b37b3c0bf
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits vulnerabilities or serves malicious content. It functions as a link farm, presenting numerous URLs that point to external resources, some hosted on compromised WordPress sites. The presence of these links suggests an intent to redirect users to phishing pages or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7817

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 https://ketchas.ru/uplcv?utm_term=beginner+calisthenics+workout+for+weight+loss PDF link annotation
    • https://monamifrance.com/FileData/ckfinder/files/20210619_AB8464064367A96D.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/56625302109.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/vuzojuwonex.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/ridaxogijejuj.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/wuzokazodofaj.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/48122114665.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/ebc4cb25c76a0b8720f9b90cdfdb2e5b/bedadumojanimov.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160831bba41153---29671227321.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/86381814093.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/6ecc80d1582acd9c719cc04c8bd8be83/50111557926.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/628621cc2242fc33fea009d42a770459/57853358902.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/gd15bin8f34sk9n82udp4mjael/lozozarotapidivoleke.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/4c0e0da4e2d21e0af1a04b8a9330b7f6/37916549832.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a3a07a3b363eeb57efe06313e904dc61/nidagozut.pdfIn PDF document text
    • http://vipdiler.ru/files/file/48791923863.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/nuxaveteninonewo.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/6445536054.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/milugufiwiwe.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/kabiwizumozewitabosut.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/44427165588.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/famuzesufukebi.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0a3c50e141---jetupitokunememagedud.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/fisireraxeg.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9417a2195---xofojosovemapajozerabige.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/85242445469.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081e5700f868---gokizexudunawoxosigoziju.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/37975364247.pdfIn PDF document text
    • 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_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 10944 bytes
SHA-256: 7e2f3896dfbaefe98867b50ff4e6414df1bc42f037c71e3268f741d3ade66f4d