Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c6c2a571a01bf6…

MALICIOUS

PDF

89.6 KB Created: 2021-08-13 23:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e1e1f1679b575f892da3294ec972f13d SHA-1: eee9da26877bb1cdabf62443d3db602dc19462b3 SHA-256: 62c6c2a571a01bf6e89eb5ec5bb8c31a7e610fe0f2a3d872af838e60bf8697de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms its nature as a link farm designed for SEO manipulation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/88a72c262ed9d177c7083f65fdbf7f34/33844209897.pdf In PDF document text
    • https://citronel.com/userfiles/files/11889587864.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/53689144640.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c239c2ec9---tetupuvid.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2f94e77a4---57375134276.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/27rg8mj93qtomdk29l7t0lv14v/jesuxonoxumino.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/5cff3c698174821319477eb8eef9ac10/lutegomuk.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082c3411bcef---7022693697.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/wadexafuborakose.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/16748712821.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/12273636889.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/24610535705.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/lunim.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a810a4e4fce---nenepirelexoporaxonu.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/matijopeperazobudewozofef.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1611460552c9c2---senatogexu.pdfIn PDF document text
    • http://iviltra.lt/images/files/1100046406.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/dcf7093ad419aa60e980a79bf7838eeb/kesitiwutosogabozis.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/81cb345243991696b456018ff1b1a41e/rujikuguwafiwifafonesomoz.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092adfb9c493---mamil.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ab5aaffa8---kaxabusobuzuros.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/13046632871.pdfIn PDF document text
    • http://firegallery.ru/img/upload/vipunowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=nombres+arabes+de+ni%C3%B1os+y+significadoPDF 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_off0000f506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 18944 bytes
SHA-256: e476f81dcf8a9442e12e19ac4f5b843721ec6bc44214b6b64f6ae3403d7c9bb2
font_01_sfnt_off000123d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BED 11112 bytes
SHA-256: 12f1bf64ed1facf475b45c3574417a05278ef6993becb8c99ec1e9a32a011892

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