Malicious PDF — malware analysis report

Static analysis result for SHA-256 efac86baad6dcc0f…

MALICIOUS

PDF

42.9 KB Created: 2021-09-29 02:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 95d4605a6bb120d383e6d3d158cab1e0 SHA-1: f4c68d20e89c4e084d725bdeeaf47edbf00a51dd SHA-256: efac86baad6dcc0fea1a069a7fb9aa6fb1be5b437b5fdc775abe3a9e8aac24c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure the true destination by using link farms on potentially untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7297

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://crewmak.ru/uplcv?utm_term=seven+forms+of+lightsaber+combat PDF link annotation
    • http://imbirimbir.ru/files/jasadaser.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/21945024318.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/92527779784.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/97614626239.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/pofexoxaguwuwivifudaniwix.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/40c06615585fbb222957aa4e9e33d3e2/14649611424.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e212c42142---totob.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf6c64fb84---kemigopulere.pdfIn PDF document text
    • http://vitrine-prof.com/files/rikepimajomegexe.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/6f1e3093f082aac8be8cb38dc975292a/95654544409.pdfIn PDF document text
    • http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/jiwepalupobaxivuzaz.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/sabuberemelomawiz.pdfIn PDF document text
    • https://chptravel.ir/data/file/segizusokid.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/29663396832.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/disadaxademut.pdfIn PDF document text
    • https://medpressa.ru/files/file/70476447805.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/45330732165.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/16514359835.pdfIn PDF document text
    • http://oldstat.ww.tj/img/file/30784850473.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/5faeeeeeba4ec240d0ed23db9c5515c0/95313710715.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/fisodozifogomopit.pdfIn PDF document text
    • https://leifs-auto.dk/images/file/44801446175.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/ginugomalod.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/mubajomipepazadojaje.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021971750118531.pdfIn PDF document text

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