Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cbb0fbc649f68c…

MALICIOUS

PDF

63.7 KB Created: 2021-07-18 22:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 37d5182d6fef86dab479c8e618669766 SHA-1: c235c0e7b868769ad73f5b5640331c31cf6d6e49 SHA-256: b7cbb0fbc649f68c031a780933fad9c5bbbdfe6123c6f8992480289967b181c0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a PDF containing a link farm, with multiple heuristics indicating its purpose is to redirect users to various external websites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the nature of link farms often involves JavaScript for redirection or obfuscation, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3845

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://status-go.net/gfx/userfiles/files/mabobaxubujuxitinelopivi.pdf In PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/poxirimixusujidajubegov.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b50562717---64275775050.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/rurufexu.pdfIn PDF document text
    • https://avenue102.com/uploads/file/sedowiburopazegoturafar.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/44948901805.pdfIn PDF document text
    • https://arerp.kr/data/file///xeridazujurilarekogibunus.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/h74c1k6ih0j8c9vsuo7rvks7r8/mewinu.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/20ren2ekv5ohuo87ikleieav9q/jijara.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa5c3cb555c---nifurutorapisedisuf.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/vnhpefm6kk863ncmcufkmchgh4/43008198939.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14ea68ed38---ruraviz.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607db2193a289---popovajufu.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/goxisudixuwavofijufamexum.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/9je03h5buqkvvrsd5tnfj3dth7/jutofikewavatal.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd21bba470---65348489200.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcac895efd---banimerixozigufaxukifufex.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/095c5de74b771126f37a05409a14df9e/depane.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/silaporoboguwo.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/ls01u53do7mngddsc9keidm7u5/mowupijuvokipu.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/62fd9aa8c4a555a6f24b8df52da49894/vetezoruduvagiza.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/bb1d4ab532e623590c594b326036242b/6530885769.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/bf1d91be9e285d5b341ae911755ce4cc/rowerufij.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/skt6j5cod2ekp37mv2k0lmb6b2/3078578808.pdfIn PDF document text
    • https://roc.mn/uploads/files/33866437697.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/c3rgssp5om44k1q362bcuobjoi/pesasabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=tough+data+structure+interview+questionsPDF link annotation

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