Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0ab62755d126a2…

MALICIOUS

PDF

91.6 KB Created: 2021-07-02 10:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 512eb99f4f4a0593a5c07375ec8a823c SHA-1: 988b46891d31611a6a492ef4f08bf918eda939c0 SHA-256: ee0ab62755d126a2f5a8dee9f578a14bccf691af208f8df931ea082bce969939
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs hosted on compromised CMS upload directories and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple links suggests an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/d3l2rmilhimu1nrp9l13beh901/53376073371.pdf In PDF document text
    • http://originalcheck.it/public/img_admin/file///77015169264.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/mt23u51r4vcqp9gvpsaef6dn70/2628310150.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/5785390879.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780a8f0651e---lilomikanawefin.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/9014748607.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/lijulogegesekapog.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/jopamebirekawidiwawafefax.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b80ce50a975---potemixeginixofavibuf.pdfIn PDF document text
    • https://gannat-ltd.com/userfiles/file/51937059442.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a170b4b0f6---32875487203.pdfIn PDF document text
    • https://efnnma.org/files/file/xidupilabebezijadewegavo.pdfIn PDF document text
    • http://windsbs.biz/files/file/36039614700.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/dbffb8c98102111bf038a3f48e811af6/21218982075.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b28356c9f35---rojekeduvaz.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d836848bb9---95885040133.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a922015db2f---rizefanepetumofe.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/08971f71185cd9f6305cbd13585c409b/37332977560.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcdbf757da---dekebezaro.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/pemuzowasut.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad39e2f2313---17334219137.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/zepulalorudi.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/c6a5b1a438b891721528c2620f74e008/mafewopik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=graham+float+in+a+cupPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF804 18940 bytes
SHA-256: 20d8a785dccc3a5d0bcd2891cf973d7172a38985dfec66517fb9926a72bb21fc
font_02_sfnt_off0001283b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283B 10584 bytes
SHA-256: 7de298f46eaaf6bbf42022edb07dc2fca23b0727cbe17a2a2cbeddd93b2522a6
font_03_sfnt_off00014028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14028 1824 bytes
SHA-256: 065c7a4f11f9e75f6e8b37807bc82b370f7b2846456f0b3b832c619392bb01b8
font_04_sfnt_off000148b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B4 16684 bytes
SHA-256: 5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d

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