Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8f6aa600e931dc…

MALICIOUS

PDF

47.2 KB Created: 2021-03-25 00:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 841b24b5102f1a945edeb30084e7976c SHA-1: 4ee51a3b087c48e17e2bd197b5fe6aa8065388fa SHA-256: fd8f6aa600e931dc2958be0d9720285d0015e2f998e38e00a4828fc16ce7a05b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.7448

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://cdn.sqhk.co/legusovej/gK8gdjd/microsoft_voice_to_text_software_free.pdf In PDF document text
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/f2a9edd905.pdfIn PDF document text
    • http://potuduwatolebu.mywebcommunity.org/bin_sachivalay_clerk_question_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/gjbjigh/the_triple_bottom_line_refers_to.pdfIn PDF document text
    • https://cdn.sqhk.co/zoburawava/x5hjjcY/zalezedinaxopaxinu.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/nixon_51-30_chrono_all_gunmetal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_605b886c5f09a.pdfIn PDF document text
    • https://cdn.sqhk.co/xudapurofoz/idhcJjg/14010810634.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/zuxebatatubagijesigomuv.pdfIn PDF document text
    • https://wivoximuvekobug.weebly.com/uploads/1/3/4/4/134473281/nuvovope_putatirizevisi_xajubixaperu.pdfIn PDF document text
    • http://tunewejewuz.mypressonline.com/how_to_factory_reset_my_netgear_wifi_extender.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fcaf11b06f94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367919/normal_5ffb879fe4a99.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/ulgeTO7/nelofalubitabira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_603b3d3f10547.pdfIn PDF document text
    • https://lebipogife.weebly.com/uploads/1/3/5/9/135990957/gigekijujuwu_rodiketikex_zuduziwevike.pdfIn PDF document text
    • https://xodebizig.weebly.com/uploads/1/3/2/6/132681497/8553492.pdfIn PDF document text
    • https://feedproxy.google.com/~r/wb/ENAH/~3/kMuynZNWtA0/wb?keyword=heart%20of%20darkness%20book%201%20quotesPDF link annotation
    • https://uploads.strikinglycdn.com/files/16c06df0-1432-48fe-a79b-5495098d4ed2/50777314470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ccbc86c-fe6e-4f3e-881e-fadcc983e0d4/how_do_you_cook_fish_on_a_weber_q.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aca7e6d-c79a-45b0-a6a4-976db3200538/feminist_literary_theory_a_reader_mary_eagleton.pdfIn PDF document text

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