Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c394de17b7e881…

MALICIOUS

PDF

141.6 KB Created: 2021-03-31 20:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: eb341b6500859fb7d34be5bffce865bb SHA-1: dee58176cc412bd3124a02b2d12edd3c6e2373e8 SHA-256: 83c394de17b7e881befb31794f4b5ad3be1dbc1b0cb54fdca9fedfbeedf42d59
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable or unknown hosting services, suggesting a link farm or redirection mechanism for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://gimoguvi.ru/award?keyword=varanasi+city+map+pdf PDF link annotation
    • http://barcaporirternet-interbank-pe.com/94398905992xfbhd.pdfIn PDF document text
    • http://gulenapirexapo.iblogger.org/jeep_cherokee_repair_costs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494663/normal_6059f0e80175e.pdfIn PDF document text
    • http://filuniguwol.22web.org/seventh_grade_math_minutes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_605ba3e349459.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/uber_car_booking_app_freeplbv3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393904/normal_5fddf50c3c6fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464056/normal_604cec92048c9.pdfIn PDF document text
    • http://trackcreditscore.info/fashion_magazine_template_envato5h0uv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_602cd8e60fc0d.pdfIn PDF document text
    • http://salonhq.xyz/60480734633jhjq1.pdfIn PDF document text
    • http://sks-expertiza.ru/loriwabnq9j.pdfIn PDF document text
    • https://b1fdf235-84a1-4479-ba44-7fc4a4f983d7.filesusr.com/ugd/afcd87_d579476ab3ae4fa6b2a1eb4e6dde5bc6.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_db3c0b9f074149c6a255fa847f0dc917.pdf?index=trueIn PDF document text
    • http://seriwod.epizy.com/cervical_spine_range_of_motion_exercises.pdfIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_27a0c5e5060e4d428541454622cf5c4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c926541-e4a3-4a7c-b6bd-e55fd8fed6d8/what_is_past_consideration_in_contract_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec985d9-aac1-4c17-a982-12347caed3a4/zebra_thermal_printer_not_printing_clearly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f2806a-d561-4e9e-989e-aa6ae78350ab/depitaribewawarudetumo.pdfIn PDF document text
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_913738affb7a4f9f9332764d0be6d1a9.pdf?index=trueIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_7cf5cc9030a14919ae63d4ec28ce51b3.pdf?index=trueIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_7fee2d6a11cb4e2ea5c1ef26084c80d0.pdf?index=trueIn PDF document text

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