Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68363a1a1697525…

MALICIOUS

PDF

50.6 KB Created: 2021-02-06 10:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1f5c5f4df12f239341b57e22d9395712 SHA-1: a3208f7b44138de9afef0394d8b3044d612c2f60 SHA-256: c68363a1a169752557dec220846682b8756acd383fb5549975563f011093ebd6
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern. One critical heuristic indicates a direct link to known malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7360

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 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.
  • 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://yafferge.ru/aws?utm_term=bvdu+school+of+performing+arts+pune In PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/a8e371b42674.pdfIn PDF document text
    • https://divulonuwuw.weebly.com/uploads/1/3/1/4/131482828/9469916.pdfIn PDF document text
    • http://idealicaitaly.site/vixokovp96il.pdfIn PDF document text
    • http://bitipusefotas.66ghz.com/transistor_bjt_bc547_datasheet.pdfIn PDF document text
    • http://cozyplacefor.rest/zotuzepeveragikamepevu0un8a.pdfIn PDF document text
    • https://mofutobanu.weebly.com/uploads/1/3/1/3/131383854/4738f5e2796e8.pdfIn PDF document text
    • https://bulabameworiw.weebly.com/uploads/1/3/4/0/134096114/95e542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454436/normal_5fe020d09b078.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/d6af022.pdfIn PDF document text
    • https://vinaxana.weebly.com/uploads/1/3/4/7/134725794/3399111.pdfIn PDF document text
    • https://legoxadev.weebly.com/uploads/1/3/2/3/132302888/wemipanejurinob-gekenerugu-gupusisobugap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426819/normal_5fcd26cb7530c.pdfIn PDF document text
    • http://loletopuwiv.iblogger.org/koxobegim.pdfIn PDF document text
    • http://meetsoda.club/vavubituritekuwojogif78xtk.pdfIn PDF document text
    • http://lezebotetojezaz.epizy.com/24425667122.pdfIn PDF document text
    • http://zunimesigo.rf.gd/professional_ppt_templates_free_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/ultrasound_scan_report_boy.pdfIn PDF document text

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