Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec715da500a46a1…

MALICIOUS

PDF

52.6 KB Created: 2021-04-14 16:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 246c63114c0ae0ad50aae3d9d7af3885 SHA-1: fecbe887dc3c09189325f0f40ccb6f567ad4152a SHA-256: 4ec715da500a46a1c7dc6f2fb80433ec8adfe07bdae16295d249228411df6ff0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many pointing to disposable hosting, and one specific URL that appears to be a phishing lure. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7360

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://xezojetit.ru/strik?utm_term=no+logon+servers+available+windows+7+cached+credentials PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368249/normal_6069ce0593b0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391001/normal_5fccba5d7821c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_6055365cd0181.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/43174453946.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/itrhggd/vazasab.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/igiagdo/imdb_bollywood_suspense_movies_list.pdfIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_69c1ea4a40de4c95af70a6d1c7667fd6.pdf?index=trueIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_ecdb39253a87458892bde54f291567a8.pdf?index=trueIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_c263dbf0d24446a4a498a66994b30856.pdf?index=trueIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_b2f5d30be58c457cbd4d0cad851dadf0.pdf?index=trueIn PDF document text
    • http://xologikaju.atwebpages.com/5572820717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b46c8c-03e3-427c-ae2d-c440e6704582/25874711800.pdfIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_4a0f6b2c807b498eafda45158bef1ae7.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_f8e57141e37e45969d74d00ea7f25b09.pdf?index=trueIn PDF document text
    • https://a48e6e70-86cd-4a78-a1a8-2329aa3e48e2.filesusr.com/ugd/3e0cb9_8c46870cface47daa637e670905b2d2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe5fb95-fb41-4ca9-950e-187a3b134f46/what_is_the_density_of_heavy_fuel_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e249556b-8c71-4201-b1ca-3e067d98105f/an_introduction_to_project_management_sixth_edition_download.pdfIn PDF document text

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