Malicious PDF — malware analysis report

Static analysis result for SHA-256 37800b81f4c899c6…

MALICIOUS

PDF

75.1 KB Created: 2021-03-02 04:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c5837d5359d28dd7748db7a3cf378a24 SHA-1: 5ff89b6d1a99fddd8f6b84871c0e4cd2828dad76 SHA-256: 37800b81f4c899c624ed5fd6e429d49607d734918253c168736381279515c671
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains embedded URLs that redirect to disposable hosting domains, suggesting a phishing or malware distribution scheme. The primary lure appears to be educational content, masking the malicious redirection.

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://lozipotod.ru/wb?keyword=daily%20english%20speaking%20sentences%20in%20classroom PDF link annotation
    • http://fofiwafajelerax.sportsontheweb.net/wubogobaritufabusezaju.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/the_devotion_of_suspect_x_2017_english_subtitles.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/real_estate_broker_license_california_online.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/bible_interpretation_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388422/normal_600f5a1de4d63.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/52673568687.pdfIn PDF document text
    • https://cdn.sqhk.co/gawarebadal/gf7jjjg/lomoduxawetudevise.pdfIn PDF document text
    • http://moitender.org/carry_on_luggage_sale_melbourneasxg4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468261/normal_5fe25ade19e1f.pdfIn PDF document text
    • http://dugules.iblogger.org/tulubutilokerosulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470222/normal_6009998493000.pdfIn PDF document text
    • http://lalashoppen.online/sharepoint_list_workflow_templatew5m8v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408594/normal_602c846da830e.pdfIn PDF document text
    • http://reduslimitalia.website/nimugivararuvodobinavaeoij0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/how_to_cite_the_declaration_of_independence_mla_works_cited.pdfIn PDF document text
    • http://nofegogimulat.rf.gd/how_to_pass_the_arkansas_permit_test.pdfIn PDF document text
    • http://vixaxupofu.rf.gd/corporate_identity_package_designs.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/what_if_movie_2010_trailer.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_off0000e929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE929 5512 bytes
SHA-256: b3be7039f2971032ea996d7070edbfb4ca3f1ed81ad2aab7c9aae8f186e2afe5
font_01_sfnt_off0000fbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD6 10184 bytes
SHA-256: d8b70fd84d8fef70d130c7563633815d42076f5cce09b64bc11d88ebf98c4169

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