Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3208e6cc2d06b44…

MALICIOUS

PDF

97.9 KB Created: 2021-03-28 11:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a601ecbe3401f4be29bea0e8dd620b58 SHA-1: e8e91e9f7774b75e36f827b9a15c17d0fcac47b9 SHA-256: b3208e6cc2d06b4413a38e981ca86f923135d5f899bfd592d2737b24cfc86209
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a high-confidence heuristic flagging it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/123?utm_term=html+css+template+for+dashboard PDF link annotation
    • http://mujumuvibofa.iblogger.org/70949995344.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/a117e0c311.pdfIn PDF document text
    • http://neojust.ru/tevonopulatarebogetewh1bm.pdfIn PDF document text
    • http://znalomstvavip.site/lirefemiwujjl2y3.pdfIn PDF document text
    • http://osthondroz.com/zumisuxojowagitagerumarl0g20.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/wicjeMC/color_fill_3d_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/hbtAidr/dog_mods_for_minecraft_1._14_3.pdfIn PDF document text
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/zorazejatilizev-bojimesalaz-wutexoreniwo.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/cCHfage/a_thousand_words_movie_synopsis.pdfIn PDF document text
    • https://ponukikoruxa.weebly.com/uploads/1/3/4/3/134343798/nolenojam_puginedow_bivoronugagu_dipojikoxore.pdfIn PDF document text
    • http://jaderulax.22web.org/30691250880.pdfIn PDF document text
    • https://dapodufez.weebly.com/uploads/1/3/3/9/133997146/tonuv.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/92559235459.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/acls_study_guide_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/233b9f55-edea-47df-8bfc-ba3e4bb281c1/jilixixodev.pdfIn PDF document text
    • http://bixozebaxikapos.atwebpages.com/what_does_the_color_orange_mean_in_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fd814c3-ea22-4cc9-aa18-5e4d86c7e436/dulokibokovaturapasow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55578966-39c5-4e91-b76f-1642f25d080d/how_to_hook_up_my_vizio_sound_bar_to_my_vizio_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b013770-51af-4dab-8ee7-24f73866f6dd/word_for_nonviolent.pdfIn PDF document text
    • http://gufogima.epizy.com/formato_apa_sexta_edicion_para_referencias_bibliograficas.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_off000143fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143FC 5496 bytes
SHA-256: a121afb8b66fd467fe4c47b7de03b44b4d8e327fe7396861faa34fe28edb1aef
font_01_sfnt_off0001567b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1567B 10492 bytes
SHA-256: c51b22d0de9be24785ea9fd561ddffaf73e8f2192f8de20e8f948c5c7e4fd30f

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