Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea03b56ebb785694…

MALICIOUS

PDF

72.3 KB Created: 2021-03-27 11:37:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: be7910dbc9ca93a873c67dea94fd7f2b SHA-1: abcc1a770db70d8275328f1bb386140458d227d7 SHA-256: ea03b56ebb7856949cc665c3052d1ce571dcd5814ca95d2616727723586c8bf0
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain keywords related to appliance repair, likely a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=how+to+repair+whirlpool+duet+dryer+control+board PDF link annotation
    • http://wordsidepost.top/apod._nasa._gov_apod_archive_pixfull._htmlt2nwt.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/2649130058.pdfIn PDF document text
    • http://notdull-eng.online/noxeludeveteli6vvw.pdfIn PDF document text
    • http://dkmz3.club/ultrasound_detector_onlineq1zpj.pdfIn PDF document text
    • http://insuranceautousa.com/what_is_a_window_kit_for_a_portable_air_conditioner8yoox.pdfIn PDF document text
    • http://redtea.space/92616493772a7q2f.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/statistical_quality_control_mahajan_download.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/how_to_write_a_proposal_apa_format.pdfIn PDF document text
    • http://gixitetopes.scienceontheweb.net/bactrocera_oleae.pdfIn PDF document text
    • http://socialwave.me/what_is_the_meaning_of_the_name_mowgli9333h.pdfIn PDF document text
    • http://nesakud.mypressonline.com/pejedosu.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/63000896721.pdfIn PDF document text
    • http://kumajamefe.getenjoyment.net/la_llave_menor_de_salomon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pajupevezujugut.atwebpages.com/bacterias_no_patogenas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed48671-b713-46d7-b1d9-390a192ade36/computer_systems_analyst_jobs_entry_level.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/81872463614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19fced88-dcf6-44f4-b048-eb4af298235c/42846443636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0cee090-1622-49d2-ad2b-cb9597572be5/xelukijaded.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/zugivi.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/how_to_connect_to_apc_smart-ups_serial_port.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_off0000dbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF4 5280 bytes
SHA-256: ceb4c608c33a1423dcadb38c7db9ed8325071ff66fcc0f7231172cb41996e62f
font_01_sfnt_off0000edef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEF 10580 bytes
SHA-256: d7cb6564663f7852d71abb067153220c231b0009cb6362d9a0f4b7f06a9351dd

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