Malicious PDF — malware analysis report

Static analysis result for SHA-256 219182e39de40bff…

MALICIOUS

PDF

77.9 KB Created: 2021-03-28 13:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 588638ed0b8183d14e8c8ba33f2b5f27 SHA-1: b924aee22e52ac9c3c5c6390325bab00a0f86f7b SHA-256: 219182e39de40bff08ac2e012e77479ef470fd0d699c5f96212333dc46a01e61
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded URLs and a heuristic firing for a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to a syllabus, likely a lure to encourage interaction with the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://resalured.ru/award?keyword=business+management+syllabus+for+shs+in+ghana+pdf PDF link annotation
    • https://cdn.sqhk.co/lojibuwe/cijhagN/7429695366.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdfIn PDF document text
    • https://cdn.sqhk.co/nejijilo/fjihcNe/descargar_proton_bus_simulator_2020_para_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/ggcRJeb/white_button_up_shirt_womens_target.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/gFlRgje/27430838998.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/2010_lexus_rx_350_for_sale_by_owner.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zorikeroz.onlinewebshop.net/accounting_and_finance_for_non_specialists_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdab1bd8-0625-4700-a237-f52c4d5e5415/71760226821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d57b66b-ebfd-48b2-9637-6a53552c03af/41429830747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/083e1664-badc-4dea-b843-978334e04350/honeywell_barcode_scanner_driver_mac.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_4aee0d71d54a4cd3bbdee12fc00433a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f050d3-3c02-4414-bace-c7d5ae53f9aa/zavibixuponuduwifajoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb16c436-18c7-4c10-8633-9756ecc851f5/when_can_you_get_your_drivers_permit_in_arkansas.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_f340fdfad72243cdb9d1e5b1c8734cd0.pdf?index=trueIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_14cb18ed21c64d6885b534906ba87990.pdf?index=trueIn PDF document text
    • http://fadudenomo.onlinewebshop.net/pazusuv.pdfIn PDF document text
    • https://15822f28-60ad-4492-b8cd-6a7816f4840c.filesusr.com/ugd/7ae8b3_a3005dfd1b9d47089200b04aa5dbded7.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 5748 bytes
SHA-256: eebc07faeebbe25940a67a77d6366b0b6e832c6cca17810f5f5795baf5400813
font_01_sfnt_off00010574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10574 10904 bytes
SHA-256: 9a85eac2c03121531db5906956be136d84c70bc8a59254561d2b295c3a16bd48

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