Malicious PDF — malware analysis report

Static analysis result for SHA-256 87dec8eb6c52b7eb…

MALICIOUS

PDF

81.8 KB Created: 2021-03-22 16:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 538787855b2e6e1aa280cb171d6182c8 SHA-1: 15e504767d9b3773a845cea6f01e2f6b5437924b SHA-256: 87dec8eb6c52b7eb1faf500a85f34bfbdf0c68fe5a619cedd16dd89772bae608
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to external websites, many of which are hosted on disposable domains or known malicious redirectors. The document body, though heavily corrupted, contains text related to a peace agreement, likely used as a lure. The presence of numerous external links suggests an attempt to direct users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9610

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://dafemum.ru/award?keyword=acuerdo+de+paz+de+la+habana+pdf In PDF document text
    • https://cdn.sqhk.co/guwezasov/eOhv2FO/68519882573.pdfIn PDF document text
    • http://bimamoked.iblogger.org/dream_interpretation_snake_bite_left_foot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427544/normal_602c76da8e7df.pdfIn PDF document text
    • https://cdn.sqhk.co/fetuxudo/bNhihcv/tyre_tread_depth_check_gauge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_6035526ee7861.pdfIn PDF document text
    • http://nusamovepi.22web.org/arm_cortex_r52_technical_reference_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410965/normal_5fea42a9238ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_5fd1e28a423a7.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/dgjUijY/igt_online_slots_free_play.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_6010f20ef20f6.pdfIn PDF document text
    • http://bimelar.22web.org/dojegegexapil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455403/normal_5fdfcd3ab01b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414152/normal_5fd06c112c4de.pdfIn PDF document text
    • http://nufurezoguboli.epizy.com/66580247284.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_df334079321445799dab28aaa8d6ae6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d1ed9a8-c708-4b44-815c-e90751da6709/how_to_connect_samsung_scx-3405fw_printer_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90974c3d-66a1-432a-8ffa-99ce7c6dd9dd/ielts_academic_writing_task_2_samples_band_9_download.pdfIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_ee72bdb0901d4e4a8e28629c9f9f3b3d.pdf?index=trueIn PDF document text
    • http://labazesunug.epizy.com/autodesk_dwf_design_review_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47837fb2-58b5-42c1-951b-b490dbb2d50b/53533234813.pdfIn PDF document text

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