Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e12da92a62bc308…

MALICIOUS

PDF

111.7 KB Created: 2021-03-09 13:30:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: da37b6d2f5225ce85e6ff7db0518185b SHA-1: 540e1b3fdcb7f2e89b192721a39797e267faf9df SHA-256: 5e12da92a62bc30807035c484e14647d466ee6caecf34847f3a21c9bf2c561a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=celiac+disease+guidelines+pdf PDF link annotation
    • http://laludinemolat.sportsontheweb.net/vomalebenalara.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/jemogidalevepi.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/what_is_the_conditioned_response_in_little_albert.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/planet_fitness_sign_up_fee_2020.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/magnetic_curtain_rod_home_depot_canada.pdfIn PDF document text
    • http://welemokakumogir.iblogger.org/22499198686.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/came_to_believe_meaning.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/scotts_riding_lawn_mower_17hp_42_for_sale.pdfIn PDF document text
    • http://nunovoxiwanafuz.getenjoyment.net/vekid.pdfIn PDF document text
    • http://vebifitapex.mypressonline.com/pride_and_prejudice_1995_pisode_1_dailymotion.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/how_to_heal_from_child_trauma.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/tomtom_xl_n14644_map_update.pdfIn PDF document text
    • http://sulogajifuv.iblogger.org/body_for_life_memphis.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/elder_scrolls_v_skyrim_special_edition_prima_collectors_guide.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/vixor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gixejemazob.myartsonline.com/abattoir_waste_management.pdfIn PDF document text
    • http://benamow.myartsonline.com/65624892349.pdfIn PDF document text
    • http://vemesivudaro.epizy.com/26779166648.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/jarojimogalejixatorusute.pdfIn PDF document text
    • http://puredaw.rf.gd/christ_college_guildford_sixth_form.pdfIn PDF document text
    • http://dusefepov.epizy.com/mewevejonur.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/final_fantasy_x-2_walkthrough_ps2.pdfIn PDF document text
    • http://papilumovojulez.epizy.com/tcp_ip_protocol_services_daemons.pdfIn PDF document text
    • http://pajiridi.rf.gd/lessons_from_madame_chic_audiobook.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_off00017b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B9B 5132 bytes
SHA-256: ebdd01053f39ea46b323cad91b38500287b008d93cd32159342eb79522a864cb
font_01_sfnt_off00018d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D28 10648 bytes
SHA-256: bb3e99a34efa8c9980d6308d901922d49441f5d1c2b83da4a2cb742783776356