Malicious PDF — malware analysis report

Static analysis result for SHA-256 3935875b0eb3d63e…

MALICIOUS

PDF

51.2 KB Created: 2021-02-24 23:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5ddc3e2e66c314f1ec43c0cd7db33783 SHA-1: 0cbc119f2a04a0874491ccff755a79882728f97c SHA-256: 3935875b0eb3d63eba4bb673348d4698d357bb4a957418a02c12be0df7d69bb7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with one specifically appearing as a search result for a book. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6621

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://bologen.ru/award?keyword=how+cars+work+tom+newton+book+pdf PDF link annotation
    • http://vodabutopidaru.getenjoyment.net/2017_durango_sxt_towing_capacity.pdfIn PDF document text
    • http://baluninelekab.22web.org/simile_and_metaphor_worksheet_4th_grade.pdfIn PDF document text
    • http://tojiritukimafom.iblogger.org/desert_rose_sting_song.pdfIn PDF document text
    • http://renakuw.iblogger.org/bleacher_report_nfl_picks_week_7.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/american_standard_furnace_freedom_90_single_stage.pdfIn PDF document text
    • http://bujobatibu.22web.org/housing_allowance_for_pastors_form.pdfIn PDF document text
    • http://kpovli.ru/130045005224r2ye.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/vixemifexomikifuxufigi.pdfIn PDF document text
    • http://nekaxikafixof.epizy.com/officejet_pro_8610_manual_feed.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/37835043852.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/majudomepasukebezawowoki.pdfIn PDF document text
    • http://tilukonera.rf.gd/29163260893.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/astrology_prediction_by_date_of_birth_in_hindi.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/84804590083.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/9557879940.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/latipofewa.pdfIn PDF document text

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