Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed633c65672d480…

MALICIOUS

PDF

82.4 KB Created: 2021-03-05 17:04:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: fb4234abb52ce479802361c73b24f291 SHA-1: 4305524656d618ca29dbb51d7b3e06314625826d SHA-256: 5ed633c65672d480134be7747ee9a843a27929305de10337e58b3bbc0ddb1795
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, with one pointing to 'gimoguvi.ru', suggesting a malicious redirection or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/aws?utm_term=toyota+camry+muscle+2020+price+in+nigeria PDF link annotation
    • http://mapotilij.mygamesonline.org/bajamafat.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/stealth_cam_command_app_will_not_load.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/gateway_dx4860_ram_upgrade.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/what_size_file_for_455_rancher.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/auditing_and_assurance_services_7th_edition_test_bank_chapter_3.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/how_to_reset_voicemail_password_on_nec_phone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/fetukiva.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/83718115833.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/71595267378.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/navatixobozopevatarox.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/guwasuni.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/zigusimule.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/91782307874.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/android_auto_honda_civic_2014.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_7ed8194b0696491e8ab61948fc4b6f68.pdf?index=trueIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_bdfacb5d9b4c4697ae61fbaafeefbfcd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/torikosuwidiwamun.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/janapada_video_songs_ing_telugu.pdfIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_d9d8031ce5f24e31ab5e1aca6eff950f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/how_to_send_a_saved_video_on_facebook_messenger.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/93373481876.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/excel_bedingte_formatierung_leere_zelle_frben.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_off00010379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10379 5576 bytes
SHA-256: 6026a712836ce43cb6e0d714f1489089fac7ad9f47e47f363a939d48d921eba1
font_01_sfnt_off00011667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 10984 bytes
SHA-256: 4159cfa353da7f21c4998d8ba6984fdc329310f6a825a8ae293c76db5d45db46

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