Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5f082bc105b5a3…

MALICIOUS

PDF

53.7 KB Created: 2021-08-14 19:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cae8ec9e9b7b8ef49e58add5fe36aa46 SHA-1: 42cdc841814f9ea79bebdff6015b0b48bcfd3946 SHA-256: ed5f082bc105b5a37d2beaffcff3aa00fa2293aba9e759704f48ce32c4da70e1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites. These links are likely part of a link farm designed to host malicious content or redirect users to phishing sites. The presence of embedded JavaScript and the nature of the URLs suggest an attempt to deliver a secondary payload or facilitate phishing, aligning with common malicious PDF tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6280

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161106d1ac1362---mikakukoxidaboratejapux.pdf In PDF document text
    • http://onlineexpert.in/userfiles/file/60535408673.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ha73cs6slr4tsqmodop7go08t4/gikojuwulori.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f472062b8dd---bofobemogijojo.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/dubovanorimaw.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/nomiviniz.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/dkhfqnvps3634eua95prevre7t/xarorivapes.pdfIn PDF document text
    • https://marosme.ro/hirek/file/kefitadibizakuze.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098169be5b11---wubitelodaxa.pdfIn PDF document text
    • http://thecuriosityshot.com/mofufexuwevixadoniguva.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/zugokukogifaxuvudogepi.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/dajesodetarigubotida.pdfIn PDF document text
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/76315558734.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/7287139741.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79f8f39143---78788940836.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3218ca66c---vabonokokejunutobe.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbae6cd14ec---42829086410.pdfIn PDF document text
    • http://jkohut.pl/file/sajuvakikewuruvuxejofaz.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/93081982433.pdfIn PDF document text
    • http://eurogeographyjoIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=misumi+india+spring+catalogue+pdfPDF link annotation

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