Malicious PDF — malware analysis report

Static analysis result for SHA-256 54298b30b38fb765…

MALICIOUS

PDF

83.7 KB Created: 2021-03-06 16:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 22c045cb227fcf1d06e3833478b8dc12 SHA-1: af7a4299e8c896db4da9bea274214bee8d77d17d SHA-256: 54298b30b38fb76556787758fd1dcca6150e1e8d3e84aabb0edaa594e55f1b9c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support lure. 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 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/123?utm_term=can+my+pc+run+elgato+hd60s PDF link annotation
    • https://cdn.sqhk.co/zevijevam/hdjfPji/fanuxiniwade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_6011b580ef585.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/gaddafi_green_book_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_6014f2b594ec8.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/jdharJy/zilusun.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/g3Qage6/1994_harlem_globetrotters_basketball_team.pdfIn PDF document text
    • http://dedarijaluwonu.22web.org/honey_badger_honeyguide.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/whirlpool_wmh53520cs-6_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/XggIggR/43056561569.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500444/normal_5fcbd24244886.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_c5a05ff160854feab6e821f7e7f03607.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4135bd93-88bd-422b-8860-42878acf9ed6/lebuxi.pdfIn PDF document text
    • http://puloxivomavari.epizy.com/android_tv_bluetooth_remote_pairing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b79fd68-b6eb-4a36-b335-cb592d70b970/rebepowipilekexopinon.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_005dfb33961946a7a5d61af3c5d24271.pdf?index=trueIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_a0e4f97c4bd44f29b8a6b1df6178b0da.pdf?index=trueIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/what_is_structuralism_theory_in_literature.pdfIn PDF document text
    • http://fudixuxutinizow.rf.gd/performance_bicycle_redondo_beach_blvd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be91b750-77c8-459c-ab73-e0ca4943488c/kubler_ross_5_stages_of_grief_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e797df-7d50-4405-96fd-1691dc8f63df/matlab_plot_title_text_size.pdfIn PDF document text
    • http://derefoxawuziten.rf.gd/kizibeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1466a59f-a173-4117-8e44-f8aa0f4caf75/48064492159.pdfIn PDF document text
    • http://jaxilikujo.rf.gd/zekakaju.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_off00010760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10760 5792 bytes
SHA-256: c91de03b21ddd2e6e4d6a333c666d00e150837f5276cf2dace8eda0e3fbb9766
font_01_sfnt_off00011ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE9 11300 bytes
SHA-256: ae88b1b06d723b3ffa246d2986e02cbfb2cd1e28d471ce675dee232d92d758b2