Malicious PDF — malware analysis report

Static analysis result for SHA-256 244023ba5c5a2103…

MALICIOUS

PDF

113.2 KB Created: 2021-04-28 05:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: de7db642339608714afe0e55fc3cd180 SHA-1: c88ccca6502c63fde003f7fc2317b2de4bb4e332 SHA-256: 244023ba5c5a21039502f662dd224561eb3ac91490742f16d55f567ba40c754e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, suggesting it functions as a link farm or redirection mechanism. The presence of external URIs and a PDF link farm heuristic points towards an attempt to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=a+la+recherche+du+temps+perdu+de+marcel+proust+analyse+de+l+oeuvre PDF link annotation
    • https://cdn.sqhk.co/niserutom/geOngg2/97288505566.pdfIn PDF document text
    • https://latavulepa.weebly.com/uploads/1/3/4/4/134461708/3554898.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/aT6hjgc/smoking_squares_urban_dictionary.pdfIn PDF document text
    • http://nomegejevo.22web.org/solex_carburetor_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/ijhjfgc/sididabitipufugarifovuma.pdfIn PDF document text
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/famotazesazuvad-fipedulufu.pdfIn PDF document text
    • https://tusaluzope.weebly.com/uploads/1/3/4/3/134374665/juteper.pdfIn PDF document text
    • https://danivuzi.weebly.com/uploads/1/3/2/6/132681213/jakejuterakis_renuturid_pupagaxizoti_vavoxuruzidov.pdfIn PDF document text
    • http://rufazezijew.22web.org/academy_stars_1_vk.pdfIn PDF document text
    • http://zojekepilawa.iblogger.org/super_hard_mazes_printable.pdfIn PDF document text
    • http://vobigabifinu.22web.org/freedom_trail_tour_guide_jobs.pdfIn PDF document text
    • https://nusisudarebo.weebly.com/uploads/1/3/4/3/134349377/mudarejozesiju_zavabimos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gomusogo.rf.gd/poulenc_trio_for_oboe_bassoon_and_piano_analysis.pdfIn PDF document text
    • http://tumurubulofomam.rf.gd/tewapaxikurasoje.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/33150295970.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/38777377897.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/2006_nissan_altima_maintenance_light_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/puxagozexuxagenirakiroma.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/gexarojekerutafet.pdfIn PDF document text
    • http://tikikenuf.epizy.com/temefetojonivuni.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/40178163279.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/bearcat_bct15x_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/99007279590.pdfIn PDF document text
    • http://tokumeki.rf.gd/dell_optiplex_9010_drivers_for_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/neterugesikukopuxoroditep.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/washington_dc_dulles_airport_code.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A2B 5464 bytes
SHA-256: 6c23c133270a43612b102c9bca88a85faa0b64e783b73cab11cf5c41b756927e
font_01_sfnt_off00018ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CA0 12808 bytes
SHA-256: f334c49db4cd70687ee34d04f4f1aa6e16b48c77f8551d47c2e8ba63e9463b54

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