Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde68da834388bca…

MALICIOUS

PDF

48.4 KB Created: 2021-04-22 07:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6021f7fecd79ee8b0591d6b5dd4b836d SHA-1: f7c42ed2dbe4a72b8a87a9b1dc366c77f4bed8cf SHA-256: bde68da834388bca1dac9f617f79d31691cbb9e6cf097d2483becd788f12c8c3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7606

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=hal+leonard+guitar+method+book+3+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463543/normal_60383be87cfec.pdfIn PDF document text
    • https://pujakopevu.weebly.com/uploads/1/3/2/6/132682627/tifesomixab.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/80790111573.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/employment_letter_example.pdfIn PDF document text
    • https://mozesejute.weebly.com/uploads/1/3/1/3/131380505/2568201.pdfIn PDF document text
    • https://rupokolox.weebly.com/uploads/1/3/0/8/130813141/dubule-losafubi-fivaruxowewufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_6012786aec39c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456122/normal_605910efeca31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_60110e8b1618a.pdfIn PDF document text
    • https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/3250362.pdfIn PDF document text
    • http://vawivulumekil.onlinewebshop.net/aiims_bsc_nursing_entrance_exam_previous_year_question_papers.pdfIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_95f1c8d1dadc4dd9a21a6bd6c7762f92.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d58a2b-660e-4683-ae10-40f35f0b8442/what_lives_in_an_ocean.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_f47b5b5cb6b94d5a8989ee5f29dedfb9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f82ff403-e1cd-4ee3-8eea-a066c74e5ee9/what_is_the_term_power_couple_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf042a57-0610-4f9f-9fa6-e2b1fa2cf798/jojugubipekasawijiv.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_d94aa1372b85421fb321857a530a375f.pdf?index=trueIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_e30b36f41ca54383a7d7afb9e3adee82.pdf?index=trueIn PDF document text
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_434d213edfc744af9227396121e3a656.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d9b655e-8df9-4c94-8254-1c85bdb4cc4c/what_does_caliphate_mean_in_arabic.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_2a596bf5fcff4151b1733f20cd7580d1.pdf?index=trueIn PDF document text

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