Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76cef7870b5623d…

MALICIOUS

PDF

68.1 KB Created: 2021-03-18 18:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de31e7d3d5a76104c14860ff5e03fbbd SHA-1: 0c11fd79d05b6308e8bd43ed34f4dea184ee92ce SHA-256: b76cef7870b5623d59230042271530350597b23842b6b716e291b417854fa29e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs, with one prominent URL pointing to a domain associated with phishing and malware distribution. Heuristics indicate the PDF is a link farm on disposable hosting, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5221

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 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://resalured.ru/award?keyword=introduction+to+automata+theory+formal+languages+and+computation+pdf
    • https://static.s123-cdn-static.com/uploads/4427085/normal_5fcaa426edc14.pdf
    • https://cdn-cms.f-static.net/uploads/4411228/normal_5fe9e0d63dceb.pdf
    • http://koxelovanalimu.getenjoyment.net/cules_son_los_animales_que_estn_en_peligro_de_extincin.pdf
    • https://cdn-cms.f-static.net/uploads/4460975/normal_6049097859f6f.pdf
    • https://cdn.sqhk.co/logulemuset/jBbhchb/best_graphic_design_software_for_chromebook.pdf
    • https://static.s123-cdn-static.com/uploads/4455380/normal_60078c6f19d92.pdf
    • http://kiramosowufotir.22web.org/39867696070.pdf
    • http://nadipewin.mywebcommunity.org/32054827069.pdf
    • http://leporabev.mywebcommunity.org/ddo_summon_monster_ix.pdf
    • https://cdn.sqhk.co/dapubebireba/h6gf7ij/baby_pink_and_blue_ombre_nails.pdf
    • https://static.s123-cdn-static.com/uploads/4373301/normal_5fca6b991ea18.pdf
    • http://xowozumevabig.66ghz.com/1385806205.pdf
    • http://wujanebinemeru.iblogger.org/georges_bataille_accursed_share.pdf
    • http://rabemedexisubis.mygamesonline.org/42715939990.pdf
    • http://papotanepif.22web.org/factoring_polynomials_worksheets_with_answers.pdf
    • http://nigodofifulo.scienceontheweb.net/ropozezozojobus.pdf
    • https://cdn-cms.f-static.net/uploads/4371267/normal_60402f9246b8e.pdf
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5fee4ed853fb4.pdf
    • https://cdn-cms.f-static.net/uploads/4423460/normal_60532b81b3876.pdf
    • http://wulibazosuxib.onlinewebshop.net/7753100202.pdf
    • http://likutolejit.onlinewebshop.net/zawunat.pdf
    • http://pimobepetokonud.myartsonline.com/servant_leadership_greenleaf.pdf
    • http://molujafit.atwebpages.com/95308588455.pdf
    • http://gixiluvigatekij.atwebpages.com/arduino_mega_2560_cnc_shield_pinout.pdf

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