Malicious PDF — malware analysis report

Static analysis result for SHA-256 0969c3d191d46449…

MALICIOUS

PDF

88.0 KB Created: 2021-07-24 14:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 95376fec8660e9a55832e9d17779dad3 SHA-1: 783d7d37cc60cedea1c18a2366e7cb76fe902261 SHA-256: 0969c3d191d464492324193b8252caac05d088dd70b24a167eb4666f646c4050
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm designed to obscure the true destination. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather to facilitate malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ecb3fbc390---28430287352.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa272be97c0---sajig.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/981efc419af2cd1abef9adb69d6de555/rikunenibigaji.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094684e559e7---80274491208.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/67616513043.pdfIn PDF document text
    • http://selmanoglusigorta.com/userfiles/file/39714902698.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/wisiz.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fad5af3a86---60395691816.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842d171dbf4---tipugexugolusowuxunikajan.pdfIn PDF document text
    • http://ausafe.net/images/art/files/50588655105.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/dolozuvujubixagilox.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16088355766624---7861594660.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents//files/ruxugedabulevomerinok.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/48175711116.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210608174305.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/cda7f14d2ca08887221734535b939285/xupozakiworatubilajivuji.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/ed047c69a359d06d32cd10f91afb1aad/28073485600.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/44002542966.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b150742f3e8---79013886584.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/37502352848.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/tojitu.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/1237531394.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/zimumazan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=guia+para+el+llenado+de+la+hoja+de+enfermeria+imssPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 16204 bytes
SHA-256: 2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489
font_01_sfnt_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 18580 bytes
SHA-256: 329fcac287c6bc4289258b69a939664f88b711f4da36c64661ce69add386d00e
font_02_sfnt_off00011eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000136c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C9 10936 bytes
SHA-256: 72627a60d3f50d72e0b021615b75527a4a0adeba7e0aabc091a93c163a1c343f

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