Malicious PDF — malware analysis report

Static analysis result for SHA-256 084fda7b9297d284…

MALICIOUS

PDF

51.4 KB Created: 2021-06-11 09:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31df2250760a4093aa13e66910229a96 SHA-1: 71eb59a926dfc08e0cdbd052fe3d74ec6915e25f SHA-256: 084fda7b9297d284c0d8d0c5f52e2d7ffdc14de02aea219c563cc04611d43c59
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 0.7510

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://oniceh.ru/pbw?utm_term=eph+guide+book+of+class+9 PDF link annotation
    • https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/kivobawipibu.pdfIn PDF document text
    • https://vugalemudapitos.weebly.com/uploads/1/3/1/1/131164275/cb50a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_60442219e87d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418783/normal_5fc9abf92d3b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501057/normal_5fd200b1d9b65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_60556d0fe04d1.pdfIn PDF document text
    • https://pefanesixalis.weebly.com/uploads/1/3/5/3/135329455/gokivumob.pdfIn PDF document text
    • https://puvapimasekasu.weebly.com/uploads/1/3/4/3/134398754/jarifedupejujezodosu.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/4f9e6717da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460471/normal_60be5dc584283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463792/normal_60c2c7fc90290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2039908-bbcf-4c85-9007-0f379ea18ef9/tuluxuzirujefegoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d81be8-3e5b-4909-bb8b-7040e40cddfa/bronx_masquerade_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32c456ad-ee43-4c34-b2aa-92523d4adce8/samsung_xpress_sl-m2825dw_laser_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f5ff5b-7ad8-4380-a0a4-6d8b9502136d/2015_nissan_altima_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/034ebfeb-9791-4a8f-9f55-8461e45ceded/select__from_tabledbms_xplan.display_sql_plan_baseline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02326e4d-2fc5-44e1-aef7-e893cd41b388/ritifofezom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43df3f0a-a04f-440d-bf4d-95fefba5f284/23710482354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb362503-8dc9-4d1f-8868-fa509739ed8a/2461023854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a491d852-9339-4c16-ae83-306ecd2f1d6f/bach_lute_suites_for_guitar.pdfIn PDF document text

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