Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffbc62e7ea4b3d70…

MALICIOUS

PDF

95.0 KB Created: 2021-03-13 12:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a4ad9b7a75fee429aaa013333e5743f0 SHA-1: 24a69211f07961d996f9d6a66c8c0ceeb9801128 SHA-256: ffbc62e7ea4b3d703597c21cb3154f92657318b12139f7ec8dda9594bf8c4c8e
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a potential link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jacksth.ru/wix?keyword=dawn+warrior+guide+v100 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450003/normal_5fda8f2a4b28d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469640/normal_5ff0ca085e83c.pdfIn PDF document text
    • http://kenujuzuba.22web.org/wimemaporuvino.pdfIn PDF document text
    • http://mefizilexofe.66ghz.com/wesat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404966/normal_5ffdba593daf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_602fb9dbddf2c.pdfIn PDF document text
    • http://timinome.getenjoyment.net/new_york_state_map_usa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413585/normal_5ff6bfafbbc25.pdfIn PDF document text
    • http://sutovuresas.mygamesonline.org/lazuregipaxuruwopufiwil.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/kokesatodixon/w-_4_form_withholding_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22415f0a-2a35-43e6-8580-2f6fa1fb847e/infographic_organization_chart_template_free_download.pdfIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_0fcb53c57779426c8459491b8253a8f0.pdf?index=trueIn PDF document text
    • http://lesasesodimavun.epizy.com/kiswahili_morphology_and_syntax.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_2b5e434a53154432ae169898cf7b0e6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovezux/rinesu.pdfIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_c9da11011be44035b454fa528357d425.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/465cfc78-e64e-422d-a667-587605df67d6/15537161973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d32200b-4fe7-4e9c-8bbf-8af2ff5c4b47/dosulipat.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_5e1a2d79be174b2b9de2494f99168677.pdf?index=trueIn PDF document text
    • http://jofesowevelen.epizy.com/application_form_for_teacher_job_in_school.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/preacher_graphic_novel_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4edf37b-5378-4f0c-9505-71d9ab5e353a/17584432740.pdfIn PDF document text
    • http://rusesav.rf.gd/lepakirukasenup.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_off0001365c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1365C 5128 bytes
SHA-256: 17f381e3ac027564dde0d503456b7c001b85602f900bae61f0bddaa90732d246
font_01_sfnt_off00014800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14800 11252 bytes
SHA-256: 58e04b913e954278286d9280b3dc85208e22520191590800de097317c52f6797

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