Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cb8e0b2cc0d6439…

MALICIOUS

PDF

82.3 KB Created: 2021-09-05 15:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1044ccd4cc1c609a408e170e1921d7f6 SHA-1: e6f008b652aa6be4823642ee95dc1f0d56b76eb5 SHA-256: 2cb8e0b2cc0d6439ae194db2395513eae5fc2e442a8433ce6a1ef2597e18182f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure victims to malicious or phishing content, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16080c94d1a40a---14113858080.pdf In PDF document text
    • http://dc-28460bd9dc5f.liebes-map.ch/ckfinder/userfiles/files/vitozugefodaw.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/9288007038.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/65938763565.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/64183001050.pdfIn PDF document text
    • https://lifeteacher.tw/uploads/files/202108241922592470.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160acd8ebeeaad---putevelujefufuxor.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/30c8732ed14379ec39cc2497650cbb57/30843958159.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/88281234397.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607742755073f---70952307528.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741cc620e5d---gaxujamaxixudotilu.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160775036110f6---15849691901.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/8556714445.pdfIn PDF document text
    • http://gurukripapublicschool.com/userfiles/file/58491658959.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cb371c5b3---lezikopomikonolo.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/ufp8ms8l27lj095b9df6t4ffgg/33494183983.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/sawazitefaxepezom.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210727104125.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/21277470381.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/49199829773.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/u136qgthlsisdachoohb16qko1/lixagu.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/2ab8c9c00498eb59da270f5ff2500d41/guwarojovovosozobo.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bc59b5993ef---40603176215.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=opinion+questions+esl+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 10500 bytes
SHA-256: b5097c0d2b27f824f48289059489be0c7fd2904bacf3e50d45356967f6b207c1
font_01_sfnt_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 18020 bytes
SHA-256: 3565df326f70d03b0b099335a079821775abbda7e2b2fe3a2344bc175bae6578
font_02_sfnt_off0001237b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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