Malicious PDF — malware analysis report

Static analysis result for SHA-256 59298f5008668fa8…

MALICIOUS

PDF

83.2 KB Created: 2021-03-30 11:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: eb4b24be20fe4630106737c8fa8007e8 SHA-1: 541b4694168e207fa2f1fb8b9b85801361ec6a7a SHA-256: 59298f5008668fa858e644645b2b0be8262528adf34cafabae4f56dbb863b72d
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 0.9996

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://resalured.ru/aws?utm_term=john+deere+z225+deck+bm23408 PDF link annotation
    • http://luxshop21.site/android_system_webview_and_chrome_not_updatingl2y6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490128/normal_5fc680ef9fd51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387052/normal_605ca88385931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_6009f6d172d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_60435c5127b76.pdfIn PDF document text
    • http://zawimumerefop.iblogger.org/famuxusos.pdfIn PDF document text
    • http://flylovel.com/6502729362407975.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fuvituze.epizy.com/1860463919.pdfIn PDF document text
    • http://suvokejixu.epizy.com/lideju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4261434f-78d6-4afd-ad27-28ead4efec80/jurusulokiwufabadinaj.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/bootstrap_3_form_inside_modal.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/briggs_and_stratton_20_hp_v_twin_oil_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465c7051-0d5d-4bd5-9d25-ff1565d46c88/dozex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71cff7f0-b9a2-422f-85e9-a7da8f49a439/night_shift_jobs_hiring_immediately_near_me.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_5177cadf6e9f404da667e1301f67b003.pdf?index=trueIn PDF document text
    • http://gefivif.epizy.com/71551739635.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/all_of_the_following_are_considered_phases_of_mitosis_active_cell_division_except.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/is_one_punch_man_a_good_anime.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_3569489103e74a5bb66912b933c74f34.pdf?index=trueIn PDF document text
    • http://gidepajujida.rf.gd/kutty_movies_collection_2019_tamil_hd.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_06c30d479a7542d4a2e1f2331db610c1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88A 5508 bytes
SHA-256: 73ab626fb6d6fafa937327382f1aafb4f5a10123dc610e07af62ee31f1d51277
font_01_sfnt_off00010b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0E 11192 bytes
SHA-256: 148062a33ea6e6e42e018ac94282d1603c349de6b655883f45516d52a48a2347
font_02_sfnt_off00013159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13159 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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