Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b246d19e916be9…

MALICIOUS

PDF

87.3 KB Created: 2021-03-22 12:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d40afc6b7fd680f24a9a8105a77c9db3 SHA-1: 593dbd690a5cb7c7f9c0070c69ecf91933b8f630 SHA-256: d1b246d19e916be9e9f6c6d350e36c07a1ff95cbd9d5bc68f9b350c3b691da23
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with attempts to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 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://golowaki.ru/strik?utm_term=what+are+the+4+major+types+of+poetry PDF link annotation
    • http://salizurewaki.mypressonline.com/probability_math_questions.pdfIn PDF document text
    • http://tihefers.online/vowel_team_worksheets_for_kindergartenkrra9.pdfIn PDF document text
    • http://itfamily.info/linear_graphs_worksheet_tesw1ydc.pdfIn PDF document text
    • http://flymoney.net/singer_brilliance_6160_erro_c4sn6sp.pdfIn PDF document text
    • http://keto-s1.com/chinatown_wars_pspeijt5.pdfIn PDF document text
    • http://otshelnik.net/66894889248g7zt2.pdfIn PDF document text
    • http://nubolutlion.xyz/vabexifoxuvifokamtuflv.pdfIn PDF document text
    • http://cabinetsapp.xyz/destiny_2_walkthrough_guidezmpiv.pdfIn PDF document text
    • http://tells.fun/94998188645w8cfj.pdfIn PDF document text
    • http://dlkmvkoenv.info/virusalibunejatibobiuk3fr.pdfIn PDF document text
    • http://relibafogat.sportsontheweb.net/how_many_horsepower_is_a_208cc_snowblower.pdfIn PDF document text
    • http://xapizokawe.iblogger.org/the_hollywood_reporter_next_gen_2018.pdfIn PDF document text
    • http://bezinawevudo.22web.org/korg_x50_for_sale.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/an_introduction_to_language_10th_answer_key.pdfIn PDF document text
    • http://idealicaitalia-official.site/26335256708sw9ax.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/computer_beep_codes_and_their_meaning.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/liberalismo_politico_definicion.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fapetaboxepug.rf.gd/sociology_net_syllabus_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/best_android_phone_under_20000_may_2018.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_25ee5d096a0b476fa2c01afca3a82001.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nagudo/ansoff_matrix_ppt_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/13739466594.pdfIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_b8e55097f9304e989d53b6d5cacb8c69.pdf?index=trueIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_512c32e8c8c34816808f0270f49b938b.pdf?index=trueIn PDF document text
    • http://jatitubez.epizy.com/53533814703.pdfIn PDF document text
    • https://36fde204-cda4-4268-899b-58717f9005d0.filesusr.com/ugd/b13063_bf0e46c202fc4fa7949daf0fe3ca2cfc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/packaging_dieline_templates.pdfIn PDF document text
    • http://vamudijikepefos.rf.gd/nobitisada.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_545f7eaa278b4b46a5e5e43688845c93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasudikek/rokop.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_off000116fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FA 5388 bytes
SHA-256: dec5bb17eda8b288a5b4da444ea306c0ac6fd04029c0f67612d7cb30c5aed30a
font_01_sfnt_off00012945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 10664 bytes
SHA-256: f8eb2cef9fbe1662d62d80687d28821a4e2d0ccff91c1d373ca6bc4da089ca71