Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d8e251d8594cfd…

MALICIOUS

PDF

79.1 KB Created: 2021-03-09 20:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0facc6ec82bd5d54cd66792f45989cf5 SHA-1: 352d06a44f835b16cdaafcc91b60d4024b1db422 SHA-256: 63d8e251d8594cfd20d58c46deba5a53ba9ce08dfcde2216f3d8066b595d16b3
134 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery attempt. It contains multiple external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to malicious websites. The heuristic 'SE_URGENCY_LURE' further supports the phishing pretext by indicating the presence of urgency language.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/aws?utm_term=starbucks+customer+service+uk+contact+number PDF link annotation
    • http://rosutob.getenjoyment.net/los_renglones_torcidos_de_dios_gratis.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/filirumemiwujedaparufasu.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/2005_mercury_xr6_150_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/ibgijjL/microsoft_to_do_list_chrome_extension.pdfIn PDF document text
    • http://vijepuwobewi.mygamesonline.org/sovolaguxewededugiwupimi.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/pigihgg/new_status_video_download_2020_mp4_sharechat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393916/normal_60341bd6a5a7e.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/tovexuv.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/no_bill_of_rights_no_deal_answer_key_icivics_activity_side_a.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/how_to_change_installer_code_dsc_impassa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_600b34288daa2.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/nezixudidixuxutipi.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/ePifhjc/angie_s_list_contact_number.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/how_to_start_fl_studio_20.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/zomokatak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481423/normal_603b93a4e8990.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/magic_treehouse_book_series_reading_level.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibemodida.myartsonline.com/hal_leonard_guitar_method_book_1_book_cd_pack.pdfIn PDF document text
    • http://kitilogokufalu.atwebpages.com/human_heart_drawing_labeled_easy.pdfIn PDF document text
    • http://vojuzegi.epizy.com/acrylic_paint_techniques.pdfIn PDF document text
    • http://bepenaguvofiw.epizy.com/76286554013.pdfIn PDF document text
    • http://xelidev.rf.gd/giraffes_cant_dance_activities_for_preschoolers.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/6642964420.pdfIn PDF document text
    • http://rofiviriw.rf.gd/66854374430.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_off0000f809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF809 5280 bytes
SHA-256: d0d370d33000581751ebe0fa570eb0c5d7c1ce4b4e4059db48e81f136ae57df8
font_01_sfnt_off000109f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F3 10612 bytes
SHA-256: 73c60665602b2f756603fb6bc2ec7b0b3a61ad44298b37b4d632b170fcb615fe

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