Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7d67f8e7693502…

MALICIOUS

PDF

72.1 KB Created: 2021-02-25 00:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b7adfb57ebb1b2277ab96c867541ecea SHA-1: 2b5dfa47c7aebdb6eca86df3308d62c1adfc34b5 SHA-256: dd7d67f8e7693502226b5862f45dac50847467b311d90ac1157aba05aaa0a5b1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing multiple embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of embedded URLs suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9063

Heuristics 4

  • 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 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://baarspo.ru/award?keyword=astronomy+and+the+relativistic+doppler+shift+mastering+physics PDF link annotation
    • http://tuimag.ru/jasperreports-_functions_maven_repositoryl7dh9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5fd5f6a43388a.pdfIn PDF document text
    • http://veronaital.space/zombs_royale._io_unblocked_7684mhb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5fc60fc69fc19.pdfIn PDF document text
    • http://videohost.space/kunosifatafufemozofeb7aigc.pdfIn PDF document text
    • http://drovazvenigorod.ru/ambarsariya_mundeya_video_song6rn81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_5fd82ae27f9f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_601eff6d1f131.pdfIn PDF document text
    • http://mobile-media.moscow/what_is_the_meaning_of_communication_skills_in_managementf877v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_600f3c4641873.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/77258880756.pdfIn PDF document text
    • http://csxmoney.info/sch_enrich_your_ielts_vocabulary4xd51.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/drawing_and_interpreting_bar_charts_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/wapking_new_bollywood_movie_song.pdfIn PDF document text

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