Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeeba71075f84ad0…

MALICIOUS

PDF

79.8 KB Created: 2021-03-19 04:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: adb4487e34055484da2651e151a1668f SHA-1: af48fb377cc53552f53a8d1280bb1a8d31987b9c SHA-256: eeeba71075f84ad060278b6a9a89139312ef11136980476d369745d72b1902ac
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 0.9994

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://dugedepap.ru/wix?keyword=big+ideas+math+practice+journal+answers PDF link annotation
    • http://daravto18.ru/rewikadarotamiur53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_5fea426aa84c9.pdfIn PDF document text
    • http://dvertsoff.ru/wavaguwetogimixujezugo6zzeb.pdfIn PDF document text
    • http://usejus.pro/what_is_sociology_subject_in_artsmqov6.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/april_may_june_2020_calendar.pdfIn PDF document text
    • http://kiluzilaw.sportsontheweb.net/quotes_from_the_bloody_chamber.pdfIn PDF document text
    • http://jushq.club/dofolugaxitarotetowenjqmde.pdfIn PDF document text
    • http://cybety.xyz/21844556215doz64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485710/normal_605154ab44464.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/7d74093f-8104-41f3-b14f-0e5b7909f67e/hp_probook_6560b_i7_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/49880742133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f314d0-5c24-466a-9853-544e9b9dda4f/how_to_study_for_the_fe_exam_mechanical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041b64c5-268a-4c38-a347-47bc556af061/up_from_slavery_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab623b9-690e-4f18-a087-5a81ab1dd0c5/yes_please_do_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bdd210c-bf8f-468f-b820-b14bc8e27de0/how_much_does_it_cost_to_service_a_volvo_xc90.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/fikopopaverapomiwawojar.pdfIn PDF document text
    • http://sinusudixuxuwad.atwebpages.com/xeweligezexexezid.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/25276757742.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/tivoxidozaxuduf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f51f194-ec45-4c94-9bcc-ec7eb0906083/2002_ford_ranger_fuel_line_repair_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/disinfection_and_sterilization_cdc_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8e0503e-1432-4297-8202-2b25573fd245/35715604482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775827f2-4414-4fc1-96f7-567884a1f0a3/wosalepe.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_off0000f1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E7 5704 bytes
SHA-256: 40df8c3e8915112d51fdf82b1dcfac0e9dd4cf76143813928427c2a7edd9ec29
font_01_sfnt_off0001053d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053D 12540 bytes
SHA-256: 9aca376191a7dcaad30d8e16e98faac881af3c87ed8c9cf9de21f93d37b4ab71