Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee7e12419c1c392…

MALICIOUS

PDF

89.8 KB Created: 2021-09-16 18:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b69865dd59c87736269db2fc389a7d99 SHA-1: 48dd49a0561347868a7acb75f94f9ce27f430977 SHA-256: 6ee7e12419c1c39290b513187c49ffdf6c88fd45f3379daedcddd9b9b0132650
164 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 acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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
  • 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://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/odfgnar3dpvmv0lmolr7gv4n90/jomubusuvidegumuluwo.pdf In PDF document text
    • http://gsemilia.it/userfiles/files/21920727502.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/89770601170.pdfIn PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/loxuwukekokerujidiv.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/7062357625.pdfIn PDF document text
    • http://foxhill101.com/userimages/marevoz.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/72253455427.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/28624321749.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/tejubuporixaf.pdfIn PDF document text
    • http://kco.su/userfiles/file/86031869108.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/389249214bd4595d77aa8a643666b164/puwulamojaduvukevajif.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/27673407378.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/61036181482.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/24608351678.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/3ecdnbm7klta6bu20resqvkt9u/82031042454.pdfIn PDF document text
    • http://vodova51-53.cz/files/41069757953.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/jipemerebitamajexatetelo.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/47988858692.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386d6b6698b---63930587643.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/c8b859983369538c5678bf7f0bd6d535/mibomunumilevemetizebox.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/woneweminotexetuwawezoda.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/8323eb343bda3138d99dbdaa4a9fcd37/96275530924.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/voduxipovepuxofovizudafu.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/d0e9958524b5d3c170deec5861f94e96/zewokabiwunogumus.pdfIn PDF document text
    • https://mashura.co/userfiles/files/fexigubagoxena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=android+oyun+club+hungry+shark+evolutionPDF 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_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 20496 bytes
SHA-256: 72f90e0737ea24f6e1a51bdaae6d9c6f2875deeb1b59f11a68e78f5740ebbe25
font_01_sfnt_off00012745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12745 11140 bytes
SHA-256: c2bb26e1d0a15d0b218ef3410c7b3774ea15460ef9e880aeb7269062f357c3f6
font_02_sfnt_off00014118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14118 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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