Malicious PDF — malware analysis report

Static analysis result for SHA-256 982a7e92d80a89af…

MALICIOUS

PDF

69.6 KB Created: 2021-10-01 01:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 08a01c8783bf286b7705b0a6236ad98b SHA-1: a9f8f6ff647cec3e90cd318c72279dfdc884f407 SHA-256: 982a7e92d80a89affeef8b4344a40f785ab42e794a83c5ad9917cbf4341c39df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure align with techniques used to deliver secondary payloads or redirect to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pixomot.ru/uplcv?utm_term=apk+mod+earn+to+die+2 PDF link annotation
    • http://youandisagenix.com/ckfinder/userfiles/files/87726941121.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pamibawelogefazalij.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/34210622496.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210925091049_947913724.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1613b99edca0c5---zesuxemobakisibadajuz.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/81434933985.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155f8ba2cdfb---pukobane.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/74607706788.pdfIn PDF document text
    • http://becskeicsodajo.hu/admin/fck_upload/file/bupabikobalowezaba.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/6m1nju3edppeemathcdrsvkeq2/37528081345.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/rojibef.pdfIn PDF document text
    • http://electric-kernbichler.at/12289354430.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/zuruzewisigezawovijefalo.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/sepazejexejibazakune.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7f2f7ba02---33499728007.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/pusopoj.pdfIn PDF document text
    • http://wjcopy.com/upload/files/32706627616.pdfIn PDF document text
    • https://questyme.com/userfiles/file/vewex.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/bowizuvunokawuziwawug.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c2bc2123b986b2d0ed8fbce0ea09b9ab/3170521227.pdfIn PDF document text
    • https://find-domain.lazy-online-shop.com/app/webroot/userfiles/files/lufiwenew.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da070ae7d9---4390891204.pdfIn PDF document text
    • https://www.posluh.hr/ckfinder/userfiles/files/retiruzewib.pdfIn PDF document text
    • 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_off0000b3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E4 14532 bytes
SHA-256: 7ed004c1829fa6c7fb6f0a7c189bafc4ccbffca12b1ac6ad7e237373448c0193
font_01_sfnt_off0000d888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD888 10532 bytes
SHA-256: 8c7cba8d411e9ecdae1025be16ef886aff4089e2c70b083b6bc2ab886f713178
font_02_sfnt_off0000f093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF093 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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