Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc0f57fe1b5fe2b…

MALICIOUS

PDF

58.4 KB Created: 2021-02-14 17:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1c8bb6ba38ca623402f000df0af5fea4 SHA-1: 7185fbe8393455fec7d11d3951a00c8947314fb7 SHA-256: cfc0f57fe1b5fe2b79cd093c0005ae5d6d89b4686cc896486d7ec7a1d0d7aea5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many pointing to other PDF files, suggesting a link farm or a distribution mechanism for malicious content. The ClamAV detection and ML classifier flagging indicate malicious intent. The document body, though partially corrupted, contains keywords related to job interviews, likely serving as a lure to encourage users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8751

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 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.
  • 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://jacksth.ru/aws?utm_term=office+cleaner+job+interview+questions+and+answers PDF link annotation
    • https://cdn.sqhk.co/dexasubu/Bhajhhh/21893923951.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/Fjjjajf/sapog.pdfIn PDF document text
    • https://wururozudarorar.weebly.com/uploads/1/3/1/3/131380521/regawatazada.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/kunareb.pdfIn PDF document text
    • http://luxshop21.site/562940381254vh20.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/gdjfeym/classic_rock_ringtones_free.pdfIn PDF document text
    • https://vawosogujatu.weebly.com/uploads/1/3/5/2/135293246/1777bbce5f.pdfIn PDF document text
    • https://vuxupiwiruxip.weebly.com/uploads/1/3/0/9/130969000/lewizugaze.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/QtqhjPf/injustice_gods_among_us_lockdown_skin_pack.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/hgjdhho/40210054154.pdfIn PDF document text
    • http://famuvaku.epizy.com/wexibixefozejexado.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/xefokawodenuroxorobebeg.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/25343875928.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/kijajutupone.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/institute_for_fiscal_studies_poverty_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/67823502678.pdfIn PDF document text
    • http://mibaruruluket.rf.gd/pozitakuror.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/9517107241.pdfIn PDF document text

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