Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb4bba649a30249…

MALICIOUS

PDF

65.4 KB Created: 2021-03-08 15:16:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e38f56fe7259ae86eb0a1e7fc3d4e330 SHA-1: 8c7eaed61cacf44ed01f4e31ff310008bc80e6a6 SHA-256: fbb4bba649a30249a70d450376a708d71f5806d87eb107673ac2e06ab54cbafa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV also flagged the file as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7249

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 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://crophysi.ru/award?keyword=nicomachean+ethics+aristotle+pdf PDF link annotation
    • https://napakako.weebly.com/uploads/1/3/0/9/130968915/dinogubokutugi-jegamaneruzubo-muxis-rumefimeku.pdfIn PDF document text
    • https://kobuzonoge.weebly.com/uploads/1/3/1/4/131452837/fakokadenagamawazom.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/1526481.pdfIn PDF document text
    • https://zixudepapu.weebly.com/uploads/1/3/2/3/132303172/d9e21b28b5db.pdfIn PDF document text
    • https://timokejega.weebly.com/uploads/1/3/4/4/134454798/1915981.pdfIn PDF document text
    • http://xinumazujo.iblogger.org/reset_apple_tv_3rd_gen_without_remote.pdfIn PDF document text
    • http://gowisogodedugu.22web.org/89628515851.pdfIn PDF document text
    • http://tukorokibenej.epizy.com/fathers_and_sons_movie_jeff_goldblum.pdfIn PDF document text
    • http://pukisutubog.rf.gd/50627885964.pdfIn PDF document text
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    • https://s3.amazonaws.com/pogolo/simple_past_tense_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/14937095461.pdfIn PDF document text
    • http://nopamijik.rf.gd/bose_quietcomfort_15_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/99730023546.pdfIn PDF document text
    • http://mefufoseza.rf.gd/what_is_the_value_of_six_sigma_black_belt_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/6611371612.pdfIn PDF document text
    • http://webubekesivamuf.epizy.com/argumentative_essay_topics_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/calories_in_a_small_wendys_chili_with_cheese.pdfIn PDF document text
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