Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae374e39ae65c06…

MALICIOUS

PDF

74.3 KB Created: 2021-09-05 01:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9abcf497cb2bf62880d0930042a03213 SHA-1: d5b14f3cb115a056394da344fdf09c44d8b58f75 SHA-256: 8ae374e39ae65c062547e2b3e9313e2bd47f161516f892846893c598d2287468
154 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, indicating it likely contains malicious content. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be redirecting users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7770

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://hintzfamilyreunion.com/clients/1/12/12a2788c5de59b93c87e4eff35998d4f/File/54734916475.pdf In PDF document text
    • https://perfecthospital.org/FCKeditor/file/fitiluduwabaxunazu.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/69560319750.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0f4ebb2c9---63320304561.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/68047676548.pdfIn PDF document text
    • https://kopari.hu/files/file/topawalovokosekivawoxiz.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/91509347937.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/7883194666463239a4fa56d6dad433f3/minejivuja.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/1d6ebd5534982618a9229adda93feeb0/nepibugamepaseduni.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a80440a44815a503ccd9c57a7a0e64e1/55488680656.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b824c1296---gifawigerexadoxalinesep.pdfIn PDF document text
    • http://kk-gorenjska.si/uporabnik/file/romikokubuluvibowozopan.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/9490237572.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/83670008440.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16116a01deb6fb---dekobuk.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d9473541515c5530e80929b3e02d2e02/pepesoresubokejumiwa.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/51267127218.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/66504502004.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/d4a057680b5b42cf3541bdd68c7627f9/limifekizabanubinetojuk.pdfIn PDF document text
    • http://kurpinar.com/img/userfiles/files/75582971022.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/vevovozogikuzetezon.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/nuwibejiranaderiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=capture+one+12+manuale+italianoPDF link annotation

Related samples 8

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