Malicious PDF — malware analysis report

Static analysis result for SHA-256 451705cbd9a99351…

MALICIOUS

PDF

99.6 KB Created: 2021-02-04 07:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5f9b06a5d950f8bb5c93b72f14fe6045 SHA-1: c13a0017c495098126f440b83e96504bed5acadc SHA-256: 451705cbd9a99351d3110b6f755194edbddbb4a1bedd4328849d2905a0710c64
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8828

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://druttle.ru/aws?utm_term=eckelson+lake+nd+fishing+report PDF link annotation
    • https://cdn.sqhk.co/vozevadijut/iOcpjhd/69407012195.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuzofu/cjjgchb/natedoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376371/normal_5ff666aa7e634.pdfIn PDF document text
    • http://gakivako.iblogger.org/circling_adverbs_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/wukikanas/fohjchc/dc_comics_villains_teams.pdfIn PDF document text
    • https://cdn.sqhk.co/xujutitula/qaJjaje/live_in_five_pro_apk_firestick_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5fd9db459f26c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5fd6a63247319.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/hhcibKJ/zombie_sniper_shooter_3d_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482208/normal_5fef9857184ef.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/8geicBp/mikitapimofigirab.pdfIn PDF document text
    • http://rosukijabadizi.epizy.com/20449697636.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/ripotemexogira.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/fanizopekipogewog.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/rajaba.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/sonnet_75_edmund_spenser_questions_and_answers.pdfIn PDF document text
    • http://tugefewose.rf.gd/alcanos_alquenos_y_alquinos_ejemplos.pdfIn PDF document text
    • http://tawatibajat.rf.gd/configura_cet_designer.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/hotspot_wifi_android.pdfIn PDF document text

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