Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8de8f6d03fb5758…

MALICIOUS

PDF

69.4 KB Created: 2021-02-17 11:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d16f1e001a71d9218d23773b1927f419 SHA-1: 928b1ecd9d4235c2145ce3f101f34959aa3cba58 SHA-256: f8de8f6d03fb5758d71d2bb515373d819b243ba2ca637ef119bb94c1968df214
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support the malicious nature of this document, suggesting it is used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9557

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+often+does+dollar+general+employees+get+paid In PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_602bb2f877a70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5ff869e713cce.pdfIn PDF document text
    • https://fufuwotasivixi.weebly.com/uploads/1/3/5/9/135966690/4829205.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/1323543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407064/normal_5ff755e0687d5.pdfIn PDF document text
    • https://xujeloza.weebly.com/uploads/1/3/4/0/134096435/sibadudo.pdfIn PDF document text
    • http://soldonlittleton.com/rasegokakefapuramofetobeeddxr.pdfIn PDF document text
    • http://pl50off.info/nature_s_answer_female_complex_reviewsd8m0j.pdfIn PDF document text
    • http://reduslim-buy.site/lupesukotafowotoj2yw2.pdfIn PDF document text
    • http://all-system7.club/unstressed_vowels_worksheet_ks2o1h18.pdfIn PDF document text
    • https://rafowatixi.weebly.com/uploads/1/3/0/8/130874563/lajubuneg_tupikizoxogeki_denikuluz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387931/normal_5ff6330649b2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381978/normal_5fdf0db801149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_5fd0827f5ee49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5fc7fbc047912.pdfIn PDF document text
    • http://simkosa.website/popasosalilbly6n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_5fdc0a39e6f45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488322/normal_60250e00e1e2b.pdfIn PDF document text
    • http://lorabedujeweb.epizy.com/mastering_biology_chapter_48_answers.pdfIn PDF document text

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