Malicious PDF — malware analysis report

Static analysis result for SHA-256 58cf4e959b00dfe7…

MALICIOUS

PDF

61.3 KB Created: 2021-03-01 21:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a8f7b6bffffa1edb0b38be960734014e SHA-1: dd533b919deeb486bc14c9eca9bf68c09e9ea902 SHA-256: 58cf4e959b00dfe74c4e026b65563b26cdc81763d652cdd3ef4f05068249b8eb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by heuristics as a link farm and by a machine learning classifier as malicious. The ClamAV detection as Pdf.Phishing.Trojan further supports its malicious nature. The document body, though heavily obfuscated, suggests a lure related to medical information, likely to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6759

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://pelibifir.ru/award?keyword=how+to+draw+out+tooth+infection PDF link annotation
    • https://juwalonivegab.weebly.com/uploads/1/3/5/3/135309433/sised_givuxa.pdfIn PDF document text
    • http://napojenewojiro.22web.org/matthew_hussey_books.pdfIn PDF document text
    • https://wuluvaxezipow.weebly.com/uploads/1/3/5/3/135393263/dokowatelidenofozu.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/do_nucleic_acids_need_nitrogen.pdfIn PDF document text
    • https://kigijogi.weebly.com/uploads/1/3/4/7/134702755/1623fa4d0a44ed6.pdfIn PDF document text
    • http://nuzetewadan.epizy.com/zofesovuxugatavesun.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/salicylic_acid_cleanser_fragrance_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/assistant_banquet_manager_interview_questions_and_answers.pdfIn PDF document text
    • http://pakafadudu.epizy.com/vojexutokebipafolow.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/litugedofi.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/65241263592.pdfIn PDF document text
    • http://vegewamofuxa.rf.gd/28822452916.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/82820586821.pdfIn PDF document text
    • http://kategemum.rf.gd/11757071832.pdfIn PDF document text
    • http://vapoborino.rf.gd/punctuation_passage_worksheets_for_grade_3.pdfIn PDF document text

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