Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e37b0dfccfaf848…

MALICIOUS

PDF

74.5 KB Created: 2021-05-15 12:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 5404f22321a170f58b48de5882c9c34d SHA-1: 7ff40aac9c4e62ec215a6dbddcf99942df129b0b SHA-256: 5e37b0dfccfaf8489a12e851a07e484f8398bff314cb79dcf48a7e5ef79e8940
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 and suspicious keywords, indicating a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wb?keyword=how%20do%20i%20fix%20error%20code%2051030%20on%20wii PDF link annotation
    • http://vidclips.design/how_to_write_a_case_study_assignment_formatirrso.pdfIn PDF document text
    • http://ionatr.space/86178579332asevs.pdfIn PDF document text
    • http://gazuravalo.iblogger.org/is_dungeons_and_dragons_online_worth_playing_in_2020.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/zodalewiwitafedesevedpi5tr.pdfIn PDF document text
    • http://vkysnaya-eda.site/pikekiwoduvigopi0c4oj.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/Miw3iiz/49998247411.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/jemitogabolhod3.pdfIn PDF document text
    • http://bigtittybella.com/intel_motherboard_sound_drivers_free_download_for_windows_7_32_bitg3ega.pdfIn PDF document text
    • http://bioforce-co.site/bitstream_font_manager_freeon8pl.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/Rhfggia/nezetorin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodagoge.epizy.com/generos_literarios_de_la_edad_media.pdfIn PDF document text
    • http://lepevalir.rf.gd/cystic_fibrosis_genetics.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/muronixuwigan.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/boca_1_racing_2_formaciones.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/31833597742.pdfIn PDF document text
    • http://jatomije.rf.gd/narrative_of_the_life_of_frederick_douglass_chapter_11_discussion_questions.pdfIn PDF document text
    • http://kujugabudejise.rf.gd/calculus_and_vectors_12_mcgraw_hill_ryerson_download.pdfIn PDF document text
    • http://folevibowabo.rf.gd/el_mundo_mgico_de_terabithia_pelcula_completa.pdfIn PDF document text
    • http://zanipibuta.rf.gd/bsc_hons_physics_books.pdfIn PDF document text
    • http://dimaninerif.rf.gd/8470713107.pdfIn PDF document text
    • http://vunipirifa.rf.gd/convert_arabic_text_to_word_online.pdfIn PDF document text
    • http://mogipenen.rf.gd/o_alienista_baixar.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_off0000e4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 5200 bytes
SHA-256: 780ce918fdf342783f7d69338aa40d6a20c5f27f4eab41d6bd52e01295be316d
font_01_sfnt_off0000f6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CE 10708 bytes
SHA-256: c7a2f2e49f7c7340ce21cfc515e9af977fd950500d40bc4d8b0978ed7a3e1963

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