Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e58e4aefefb1ee9…

MALICIOUS

PDF

79.5 KB Created: 2021-04-26 21:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cce176738bc37cb5d330f2ee8751c98f SHA-1: 94387494c685dd5fd36be2cfc0d2cbd91b87b9e9 SHA-256: 8e58e4aefefb1ee9469d572235cdab20c36f7dd69cc61db5d52c2f42b3c40db1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=is+keto+cycle+good PDF link annotation
    • http://pedaxofanor.mywebcommunity.org/mirisosodijixa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470703/normal_5ff504a340316.pdfIn PDF document text
    • http://latitekiwa.scienceontheweb.net/questoes_cespe_analise_combinatoria.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/mejor_app_de_finanzas_personales_iphone.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/69561472544.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/affordable_care_act_application.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_6043b88a34615.pdfIn PDF document text
    • http://raxewapikeb.mygamesonline.org/acting_out_culture_2nd_edition_free.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/jetumatasevovuvuzunig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5fcdc9cb67bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464871/normal_5fd82929bfd9f.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/livebitimagetexinomojusek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b4f8d5-fcd7-4723-9f98-def967e71e33/torakavun.pdfIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_6b545738f7304591bf77d1f97626f578.pdf?index=trueIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_eb6c00ae9dc941139ec68ebf737f210a.pdf?index=trueIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_fc69e17bf211448b9961b4dcc2ab8371.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4517002-8c81-45ae-ad04-2867087cc03d/5365652888.pdfIn PDF document text
    • http://bigamutalunu.atwebpages.com/gakiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06088409-ccd4-4a30-819f-b317a8ee6125/kibesetakabipufegubaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc182e5b-4e0c-4b4e-abfd-680ea799ac2b/sazuzatotup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d8a87b-6437-41e9-956d-6e8eccc0736a/68781299518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba224ec-7a6f-4763-9ff3-46482922ad3e/bibl_104_quiz_1_quizlet.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_off0000fb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6F 4904 bytes
SHA-256: 8e882b939397e8f51852c0cee41b86aa2045d808ceb909c28a10a1b048a329ee
font_01_sfnt_off00010c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 10812 bytes
SHA-256: e0c090e9408a9fa6e33c2f5276aeb0dfedee885d25fa73d450ac5ecead219ae3

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