Malicious PDF — malware analysis report

Static analysis result for SHA-256 74410c68a3ace4ed…

MALICIOUS

PDF

88.9 KB Created: 2021-03-10 09:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 354b75c2fd064f7a90d5bb4909ab18bd SHA-1: c6b91a19ef50e6dbeaa5b880335b8fd31a43e757 SHA-256: 74410c68a3ace4ed493a41fabfd472b5dc5347b7364232ddde1586bf2bbda5a8
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 0.9991

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://jumiwimov.ru/award?keyword=chakras+francais+pdf PDF link annotation
    • http://opencabinets.xyz/kugid238mk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_5fe76a18cc5ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406785/normal_600d21cc5b5ac.pdfIn PDF document text
    • http://espaceclient-cmb.com/the_sims_4_product_codesy1qhn.pdfIn PDF document text
    • http://aicberg.net/how_to_replace_drain_pump_on_maytag_bravos_washerfce59.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvopone/6Jgfi3B/9526_arcade_drive_spring_tx.pdfIn PDF document text
    • http://haifaiv.ru/atem_television_studio_hd_rack_mounti5q9j.pdfIn PDF document text
    • https://cdn.sqhk.co/safovokon/gZdgdih/ocean_rift_vr_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_601461903ab29.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/jjhjmBi/zutaxodoxoverifireru.pdfIn PDF document text
    • http://love-your-lips.online/eia_us_crude_inventory_reporti7k9t.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/iezhdjf/vuwozaxebatokujedanatajav.pdfIn PDF document text
    • http://salebox.shop/tujemurolokojuwibvno13.pdfIn PDF document text
    • http://netlysy.online/46534746475rog7q.pdfIn PDF document text
    • http://rubka.space/future_perfect_continuous_tense_worksheetvexu7.pdfIn PDF document text
    • http://damvglaz2.xyz/320655537916ew12.pdfIn PDF document text
    • https://cdn.sqhk.co/likamigid/Shjuje5/the_dark_pursuer_apk_1._71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://kodekexonalana.epizy.com/bolt_head_size.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_29f765fa35e94143b2e564ccda243f62.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_0254313e657747e6a1c2ee1ca04f47ad.pdf?index=trueIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_b9f2f13509de49f8b0fbf140f11d9410.pdf?index=trueIn PDF document text
    • http://dupukaxibubot.epizy.com/14890364739.pdfIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_e797698d404f4b948f7191960b0b40ec.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_off000104b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B6 5180 bytes
SHA-256: 6496babb505fbb571c39858834bb558bfb8aa851a22d6d45caea772fc9e8e974
font_01_sfnt_off00011651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11651 11976 bytes
SHA-256: 9a9058991649a520a8cc5866bd2c67af51cf827694a8be8f9ff8ebe856ba52e8
font_02_sfnt_off00013cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDE 7488 bytes
SHA-256: 62ca4b44c59929458cfd125cb18d5efdc3bffcdbb5bb09d4544e5ff9d4655c01

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