Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbfd451bfae1d898…

MALICIOUS

PDF

81.1 KB Created: 2021-03-08 12:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2f8b9aeb5ba5ab4eadf04303b3f5b145 SHA-1: f2e6606197d2751462486618e3cd42ca0dd30c73 SHA-256: fbfd451bfae1d898cbff24edf759b2090c1f71d638129bb42d7d4645f227efd2
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://leonvi.ru/wix?keyword=seventh+day+adventist+church+lesson+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404529/normal_60092310a6679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450428/normal_60380027409a3.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/Hjhhchf/como_se_dice_ranking_en_plural_ombu.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/what_does_the_origin_of_species_explain.pdfIn PDF document text
    • https://cdn.sqhk.co/lasanamemego/gigjha5/fanenuteluzapin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480403/normal_603f5ac7c540d.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/hbibmib/33068722037.pdfIn PDF document text
    • http://suvekitubexeso.getenjoyment.net/how_am_i_feeling_today_faces.pdfIn PDF document text
    • http://slimitalia.space/wijiwa7w0m9.pdfIn PDF document text
    • https://cdn.sqhk.co/rasidepad/hhojgdf/23570979577.pdfIn PDF document text
    • https://cdn.sqhk.co/wixadigizal/FnUjiRC/mind_games_john_lennon_chords.pdfIn PDF document text
    • http://namedaun.fun/scikit_learn_is_a_machine_learning_python_packagekzj59.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/legenapi/client_onboarding_process_flow_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7472a89-f4ea-4209-a008-4262b7bf17dd/79583071403.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/majigomovufurabigedojesir.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/standard_of_excellence_enhanced_book_1_flute.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/what_are_the_quietest_wiper_blades.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/gakixexidofoxetegakavure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da82633-3351-4510-a854-3e7d9d819364/34575983409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2623a9dd-1575-40aa-b4ec-7e13cf486ea8/parkour_near_me.pdfIn PDF document text
    • http://fedonefekipide.myartsonline.com/96115367382.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_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 5564 bytes
SHA-256: af1b4f098165e52074f71832fd6088db7d6d34e48b9a2e272e6faa1c7740e0fe
font_01_sfnt_off00011388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11388 10288 bytes
SHA-256: 6afe2ba9bc3c9c1927fa9ff4ccf958597333525b6eb68da35cfe01e71ec218ff

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