Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e065b89bf3c84f…

MALICIOUS

PDF

85.8 KB Created: 2021-03-13 16:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 07316ff434a213f23f56dc0b9bd42ff3 SHA-1: a474fca6575b082a417d4ccab7deb6e25007228b SHA-256: 88e065b89bf3c84f6e4d1adfb3dcb7d43db615ae9a2798671c5daca2ff82bc56
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain that appears to be a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily garbled, contains text that suggests it is masquerading as a PDF related to a book title, which is a common lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/award?keyword=heliog%25C3%25A1balo+o+el+anarquista+coronado+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392860/normal_6012917dd23fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467927/normal_5fcdfc85d9f36.pdfIn PDF document text
    • http://gobigs.space/comparative_dissolution_profile_guideline_fdasoz17.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/CgcgeCd/alan_walker_best_songs_offline_mp3_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kogoruzojif/hfxxgjN/potion_explosion_the_fifth_ingredient.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/48302709984.pdfIn PDF document text
    • http://unreguezff.rest/37244420083cdnjc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480170/normal_5fca2225b6871.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/pride_and_prejudice_summary_chapter_28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_6029a45b8c12a.pdfIn PDF document text
    • http://brightshopbg.xyz/hs_xrt_pro_unlock_codescd3k4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_6035060bb3c2e.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/dgfjaie/21333455183.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tajiroxajesolut.atwebpages.com/59083390951.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/nugipevavawufaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/dafek.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/raci_chart_template_excel_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39e2535-8248-4762-810a-6f3991f07160/what_is_meant_by_conflict_plot.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/52903437948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35231b6e-bd68-4fde-92e7-da1c6d7221d6/temple_of_seti_titan_quest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54c8d09-1440-4377-b07d-ebf19fe84162/2_consequences_of_the_end_of_the_open_range.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc3f56b-38ae-4cca-abba-7147bf2ad575/xl_big_green_egg_corner_table_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487924a7-00fe-4e59-b2a4-680796b7dcb9/megewijizuxokorijirixiv.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_off00010a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0D 5784 bytes
SHA-256: 325d04f9673b3b099d542a18bf56189f0059a75181d755c765a19c70df1e7f68
font_01_sfnt_off00011d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2F 12988 bytes
SHA-256: 564d6ae1d7d705c72abbd34e2f4af8bdcc033dd3a186206889bfb7fbbbfc2d80

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