Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeafd9b399f5b539…

MALICIOUS

PDF

75.8 KB Created: 2021-03-23 18:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cbb26fbb2de7726764f4aea9d8c1af2a SHA-1: e0c581a6277190a8b915d558380892b3160449d4 SHA-256: eeafd9b399f5b53901d80c62c045cfc6d06b974a381d3370c0f8d07808cf5830
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://seumenha.ru/123?utm_term=cbse+grade+10+science+worksheets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483586/normal_5fef78eda8fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_5fd8e837a0267.pdfIn PDF document text
    • http://gisowutuxa.22web.org/google_form_database_spreadsheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412584/normal_6002235b172b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490128/normal_6035b44edcb79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408009/normal_5ff69c4c095e8.pdfIn PDF document text
    • http://mutalunepemaw.22web.org/can_a_file_be_dangerous.pdfIn PDF document text
    • http://rifivejawix.22web.org/la_monarquia_absoluta.pdfIn PDF document text
    • http://loxalobew.22web.org/biferununujupubix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369775/normal_5ff3bb5fb3aa3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_44bbe7f3f05442b08a39693497629c86.pdf?index=trueIn PDF document text
    • http://mavowidigusuj.rf.gd/how_fast_is_eminems_fastest_rap.pdfIn PDF document text
    • http://givemuzod.epizy.com/alesis_performance_pad_manual_espaol.pdfIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_39e4165f51a246db8da0cb2181407090.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/3204801604.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/bertelsmann_stiftung_transformation_index_bti.pdfIn PDF document text
    • http://namopidud.epizy.com/jetusiligatulodav.pdfIn PDF document text
    • http://votarim.epizy.com/fetejifabilawazukamaburi.pdfIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_c23ccbc881564b88bb59c27d86a2ee79.pdf?index=trueIn PDF document text
    • https://411563d6-f1a1-4768-9eaa-86e4eb1f1ae3.filesusr.com/ugd/6d8349_365f3ff3fddb4f7488c0b069f5f1fe70.pdf?index=trueIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_70ec3be513c9403d87fe8ba36b5fcc89.pdf?index=trueIn 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_off0000ea4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4B 5564 bytes
SHA-256: d29751952cb12ed630f00c84ca516484b78d8be461bf02132f64ec4188873841
font_01_sfnt_off0000fd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD40 10960 bytes
SHA-256: 3c04a7cf5caf1c76d47cbd291b9d0f56ec98f116d05319375eb2592aeb0f36f8

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