Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f77158efae74cd4…

MALICIOUS

PDF

53.8 KB Created: 2021-02-26 02:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 834d96d9826a05111b8fb2b464423401 SHA-1: 72cefdff63ab13a0abdea5840967676c2cbf3adc SHA-256: 2f77158efae74cd467625bb99c6a0e245a187c82a669d8575c7440831903eda9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains multiple embedded URLs, with a primary suspicious URL pointing to a redirector on 'maypoin.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a link farm designed for SEO manipulation, likely to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7165

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
  • 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://maypoin.ru/strik?utm_term=aswc+1+instructions PDF link annotation
    • https://nekamefirojes.weebly.com/uploads/1/3/0/7/130739169/a2c72fd.pdfIn PDF document text
    • http://sozefavi.22web.org/letemobeluwetopusajoweb.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/jbjisqh/56443826167.pdfIn PDF document text
    • https://cdn.sqhk.co/derilunadine/aiiTXgh/kazenekijegulubunami.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/Mhdhaic/tidajinememevilevewanu.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/jaboxuzexizi.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/lghiegd/legion_of_builders_and_destroyers.pdfIn PDF document text
    • https://gaturavokig.weebly.com/uploads/1/3/4/3/134317265/ff9f7fd.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/jhijEkB/killer_blast_banana_ball_python.pdfIn PDF document text
    • https://foxetevuleludo.weebly.com/uploads/1/3/4/8/134859937/308f2b713f.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/ekLHif6/10152752187.pdfIn PDF document text
    • https://pugotaba.weebly.com/uploads/1/3/5/3/135302821/1573763.pdfIn PDF document text
    • https://jisiresofuwidi.weebly.com/uploads/1/3/0/7/130739297/2a9b7c.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/texas_comptroller_monthly_sales_tax_report.pdfIn PDF document text
    • http://bukavomagotixe.rf.gd/pemupafivomepimasorug.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/alcatel_1x_manual_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/branches_of_government_chart.pdfIn PDF document text

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