Malicious PDF — malware analysis report

Static analysis result for SHA-256 106cebd3a2397d64…

MALICIOUS

PDF

77.7 KB Created: 2021-03-15 05:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5f1e439dc9615e9db3195d3c11e01bea SHA-1: 5ba151f1e87381b819290ddde377b387b3f65453 SHA-256: 106cebd3a2397d64405b6ecac9864ff5b4499196cc96faf634c50dd2cbc955b1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to potentially malicious domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The ClamAV detection further confirms its malicious nature. The document's structure and embedded links suggest it is designed to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://gimoguvi.ru/wix?keyword=operations+with+complex+numbers+coloring+worksheet+answers PDF link annotation
    • http://subuxiwubemew.getenjoyment.net/bagor.pdfIn PDF document text
    • https://vogexuweju.weebly.com/uploads/1/3/0/9/130969932/zidalowuf_junijebo_malobo.pdfIn PDF document text
    • http://e-devletodeme.net/45963167042isilg.pdfIn PDF document text
    • https://rawowoxok.weebly.com/uploads/1/3/4/3/134309987/2710.pdfIn PDF document text
    • http://1eyvgo.xyz/25536211669e6rqu.pdfIn PDF document text
    • https://xigizimevavas.weebly.com/uploads/1/3/5/9/135982966/zipos.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/data_warehouse_vs_data_lake_vs_lake_house23nqb.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/lenovo_t420_ram_upgrade_16gb.pdfIn PDF document text
    • http://vigastlens.xyz/descargar_drift_tuner_racing_mod_apklzue2.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/telecharger_certificat_de_cession_de_vhicule.pdfIn PDF document text
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/bazemut-zexubo.pdfIn PDF document text
    • http://halfraire.xyz/3263736429apmxy.pdfIn PDF document text
    • http://prizinsta365.online/honda_goldwing_gl1500_repair_manual5y3e5.pdfIn PDF document text
    • http://ellmax-site.xyz/what_is_david_attenborough_net_worthkow7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxime/10_best_android_apps_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7471716-a38a-4b6c-ab00-d17bf171afc1/creative_writing_exercises_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/doturunufizadobuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/91964335758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6202473-399e-4934-99fc-2cdd15664a01/weed_eater_featherlite_fl_1500_carburetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/447589ac-923a-49aa-b8f4-13e5a83f1d1a/how_big_of_a_stand_do_you_need_for_a_55_inch_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/88052957763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12481d2d-6be0-42f3-b1f8-ba1784600701/what_subjects_are_needed_for_marketing.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/womiwukujupolizemo.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/lofedumonina.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 5736 bytes
SHA-256: bac84899c461b4a93dab5f4d069c86a3f76a31c22d0051ecb693823012d7d450
font_01_sfnt_off0001017c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017C 11124 bytes
SHA-256: 51b6e5f067e2bd679ad0bc4e99296c36ecef6f5a73e1cafec58c4f5ad5a85f0a

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