Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d7a003a7eebe36…

MALICIOUS

PDF

78.3 KB Created: 2021-04-07 07:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b84fc98abe79eb446b43375a4b2bb72 SHA-1: 7f45acbf5e2cfd79b46070931fa3dc549174f526 SHA-256: e1d7a003a7eebe368b729bffb084d2b61e5d3f8a12dc4ac83b8a43b5ca328efd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=how+do+i+identify+my+howard+miller+clock
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/884533c.pdf
    • https://xepapure.weebly.com/uploads/1/3/4/3/134367208/c6a780.pdf
    • https://cdn.sqhk.co/gizapakoni/gdI9jhN/42229161793.pdf
    • https://cdn.sqhk.co/tatidukigag/fij8gh6/best_emulator_master_system.pdf
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/55571480d.pdf
    • https://cdn.sqhk.co/ludozenidi/ggifgfx/monivate.pdf
    • https://guzovadolo.weebly.com/uploads/1/3/1/6/131606502/nupok-lelegaxekuga-velirikuzijo-lafamajovuluta.pdf
    • https://cdn-cms.f-static.net/uploads/4420037/normal_600ed3771b120.pdf
    • https://cdn.sqhk.co/fitigeru/f0Phbih/fevedirijinukot.pdf
    • https://cdn.sqhk.co/tenokesime/jakAjfe/photo_collage_maker_iphone_free.pdf
    • https://cdn.sqhk.co/petebeki/ijhgjg9/weed_wacker_home_depot_battery.pdf
    • https://tasufevijusenix.weebly.com/uploads/1/3/0/8/130814010/zowoxabe_nanuretivi_lufesav.pdf
    • https://cdn-cms.f-static.net/uploads/4388279/normal_606a08411dd81.pdf
    • https://zopokobo.weebly.com/uploads/1/3/1/3/131383813/palozen_kowunipip_rubavijevojirap.pdf
    • https://cdn.sqhk.co/lewoxiguj/mfjdjf9/allegiant_stadium_jobs_bartender.pdf
    • https://namewedopuso.weebly.com/uploads/1/3/4/5/134583017/b6e2e.pdf
    • https://cdn.sqhk.co/goduwonon/bTif4ib/kulebemowa.pdf
    • https://static.s123-cdn-static.com/uploads/4413016/normal_5ffc153d77ece.pdf
    • https://cdn-cms.f-static.net/uploads/4462096/normal_604d2e3240a92.pdf
    • https://cdn.sqhk.co/gidenateg/7K3hjbJ/dry_ice_blasting_machine_ebay.pdf
    • https://cdn.sqhk.co/peluxisomex/H9igTjd/dr._web_security_space_life.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/92dc275f-b302-4d91-8cb2-5b0f164a6d29/typography_logo_design_free_psd.pdf
    • https://uploads.strikinglycdn.com/files/3d753115-7573-4c40-b20b-cfcb5cfccf96/tutup.pdf
    • https://uploads.strikinglycdn.com/files/267faa18-dc3d-4763-83b8-a236d56d0459/bokobawujazujoduzoxik.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f581.bin
8e5722230d9e7d4faf91bce6e5091431f850662a514caa9f444dcbe68d57f420		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF581 5300 bytes
font_01_sfnt_off00010770.bin
c777681fe375f12a1775f8c2dfc768c2587e3882667311fc5fa5c008d98c597f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 10532 bytes

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