Malicious PDF — malware analysis report

Static analysis result for SHA-256 72046a442f9d2a43…

MALICIOUS

PDF

80.1 KB Created: 2021-10-20 18:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 92e423996fb185200d3d02652da18ed4 SHA-1: 6ea4359e421feab09343754f3ecbcdf059e5c931 SHA-256: 72046a442f9d2a430e4d207a58d3f786d03f9fadbff9a61d2e602c72646d4efa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pixomot.ru/uplcv?utm_term=procurement+and+supply+management+pdf PDF link annotation
    • http://studiochiodo.eu/userfiles/files/603571886.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/vipewenoma.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/ha0huadu38b0hs83rj3mivimje/57933759241.pdfIn PDF document text
    • http://ruihuitax.com/files/file/19162692501.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/57170442391.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/19787147842.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202110161219103256.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/65666290123.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/22005166329.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616f99067764e---28149032448.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/defudevololafaxox.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/wumuwiginibifirizagulam.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/23063101391.pdfIn PDF document text
    • https://portoggitter.no/content/files/userfiles/file///pubore.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/batijukarugudubizu.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/tutixisanolipoburek.pdfIn PDF document text
    • https://gozdekadife.com/resimler/files/73939611536.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/2549219058.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20211001004835.pdfIn PDF document text
    • https://kmedebiyatgunleri.com/ckfinder/userfiles/files/rizefozu.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/83631029307.pdfIn PDF document text
    • http://twatpchome.touchance.com/userfiles/file/zupojevat.pdfIn PDF document text
    • http://st03.it/userfiles/files/kedoteki.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_off0000d689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD689 16520 bytes
SHA-256: f91ab0f90e1c8ccf46e9dc7ab75fdb06b0b60b38c8f821e93771d6cefb761a80
font_01_sfnt_off00010123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001193a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193A 11084 bytes
SHA-256: e73cf05fab84756c4f5d17005531686c9324ac70ed23f5b5a2914a236d58688f

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