Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94c388ed2e24e7f…

MALICIOUS

PDF

124.2 KB Created: 2021-03-29 21:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cad259c9104a864890d1b8126e22a49a SHA-1: 048ca7579ba6afb592602b41e669559128546b3a SHA-256: c94c388ed2e24e7f2c9ee72c91cebd27059929045e67a63738ff9312e837d27b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, with the primary malicious indicator being the URL 'https://gimoguvi.ru/award?keyword=sri+rudram+lyrics+in+kannada+pdf', which is likely used to redirect users to a phishing or malware distribution site. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a malicious intent to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/award?keyword=sri+rudram+lyrics+in+kannada+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479435/normal_600ff827c9ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_603f0748bd299.pdfIn PDF document text
    • http://juzufafezena.22web.org/pronoun_antecedent_agreement_lesson_plan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493917/normal_5ff3829a0828c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473622/normal_60565c2416603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469374/normal_6022b01e06a11.pdfIn PDF document text
    • http://velavedi.iblogger.org/ganapenef.pdfIn PDF document text
    • http://viwavidif.getenjoyment.net/ielts_reading_passages_free_download.pdfIn PDF document text
    • http://waniruraguxi.22web.org/brother_hl_l2321d_specification.pdfIn PDF document text
    • http://surozofawowidom.scienceontheweb.net/71330466771.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/pdf_converter_for_macbook_pro.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gazosaka.epizy.com/determination_of_equilibrium_constant_lab_report_discussion.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/xovojogurodofije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee2b76de-887e-4398-ab1c-8a7a2b70e445/xaxugomufusinobened.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b766f5-9d4d-4c51-b194-d815749b03f3/rewasez.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/longitude_and_latitude_lines_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/dun_bradstreet_international_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/get_adobe_flash_player_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/barcos_que_vuelan_paula_carrasco_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a547c3c-e8a6-434a-b362-4e5e6c345ba5/nijanugisex.pdfIn PDF document text
    • http://tajiroxajesolut.atwebpages.com/15187213954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1013c1a4-f71e-4465-a5c6-f56c6d6c950f/how_do_i_change_my_weight_watchers_scale_from_kg_to_pounds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b29bc14-9258-4aa5-8f7d-f4f534e5b4e5/kodak_printer_esp_3250_troubleshooting.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001626c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1626C 46052 bytes
SHA-256: 993fae71b72eb25540b16b9af883604032d076771e2ccd332777a26dbd341cdf
font_00_sfnt_off00014615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14615 5568 bytes
SHA-256: af43ba8a5c3ad9e5b634ba388bcf6e9256f471d6a0a75e44da09fe1a6854c5f8
font_01_sfnt_off000158f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158F9 2140 bytes
SHA-256: fd0baac36cf8fc893687cbe6b3b8165417b6c4fca046c9a5e64821bfdf5295b8
font_03_sfnt_off0001ae56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE56 12448 bytes
SHA-256: 1a8d8577315c940be5cb578a81ddffb829de7c3f5c9bffe3609d554cecc6daa0
font_04_sfnt_off0001d615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D615 2972 bytes
SHA-256: 03b95ad0509530773bc810bcace048847d953cd72b60dd81043d6ef589048093

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