Malicious PDF — malware analysis report

Static analysis result for SHA-256 0053de4dd50e7274…

MALICIOUS

PDF

67.9 KB Created: 2021-04-05 12:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f36c17e1dd924554fa8f385c964da722 SHA-1: 009660f69149e1f1b7db2decfce2ec86f245a6f3 SHA-256: 0053de4dd50e727452aa185779aaf32dcfe96461febf4ef8dcd929e12ee55219
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The document body, though partially corrupted, indicates a lure related to 'action research in classroom discipline'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8223

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • 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://baarspo.ru/award?keyword=action+research+in+classroom+discipline+pdf PDF link annotation
    • http://gelokan.sportsontheweb.net/ielts_general_reading_recent_actual_tests_download.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/haQPThb/free_rider_definition_us_government.pdfIn PDF document text
    • https://cdn.sqhk.co/nomowaxiwo/jhNWggH/american_woodcrafters_supply_coupon.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/0DhjihW/woodworking_shows_2020_california.pdfIn PDF document text
    • https://baveretam.weebly.com/uploads/1/3/5/3/135314503/9931140.pdfIn PDF document text
    • http://vofigasu.medianewsonline.com/opposite_words_in_kannada_list.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/Ep1wYjh/drive_by_baby_shower_decorations.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/76826392316.pdfIn PDF document text
    • https://pedulexonevexo.weebly.com/uploads/1/3/0/7/130740508/xezaz_makelewovino.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/Nghgdic/vortex_bladeless_wind_turbine_seminar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://70745723-7f4a-4dc7-98be-95bdce43cd82.filesusr.com/ugd/67bae7_74240c70dccb423586c94f18e3754da9.pdf?index=trueIn PDF document text
    • https://cfae799c-d04a-4395-b2c2-700dffd2ed5c.filesusr.com/ugd/15504a_7f7bb36951d44ce2b9f4f9973fc008b1.pdf?index=trueIn PDF document text
    • http://gigapenawer.rf.gd/excel_vba_function_not_showing_up.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_9067f1ed3e914c91a7f0f1d0b327df14.pdf?index=trueIn PDF document text
    • http://legabukev.epizy.com/gotozimibive.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_0ddb3d330be94006b08e38b58f6cfbe0.pdf?index=trueIn PDF document text
    • http://sikejilewiz.epizy.com/18520643573.pdfIn PDF document text
    • http://nuxavezuzoja.epizy.com/focus_group_interview_guide_template.pdfIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_2875606e7d6f4344b0422e4543480170.pdf?index=trueIn PDF document text
    • http://rususekobijo.myartsonline.com/ocular_pathology_textbook.pdfIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_ae8de61b364644aeb77eae75a8f759c9.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B5 5384 bytes
SHA-256: c198d7f3025f65a817fd787fe6230b9baf51fba1ad4f363ea97bfec535bab41f

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