Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d572c884b2e707f…

MALICIOUS

PDF

92.4 KB Created: 2021-03-20 02:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 270a9fae709ed84a09adb20743d1833d SHA-1: 34c810adecb35c3cdf6a4325a44d41f8890abe04 SHA-256: 2d572c884b2e707f7d0ff9fc28e8f1750124afdcafff71e796f6c4f5d6dedeb3
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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=flowers+in+the+attic+films+in+order PDF link annotation
    • https://cdn.sqhk.co/rufosopufu/djhtjcX/merriam_webster_learner_s_dictionary_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/cjdFhhw/animated_cartoon_gifs_free.pdfIn PDF document text
    • http://1fps.ru/vajoxesofazibujtxzge.pdfIn PDF document text
    • http://sun-italy.space/used_coleman_hot_tub_partsq8p27.pdfIn PDF document text
    • https://cdn.sqhk.co/wemopizajazo/gcIjcja/29476245765.pdfIn PDF document text
    • https://cdn.sqhk.co/lutadamafe/mvUVujc/easy_hot_chocolate_recipe_with_cocoa_powder.pdfIn PDF document text
    • https://cdn.sqhk.co/lonubugogere/1YhgidF/directv_channels_lineup_2019.pdfIn PDF document text
    • http://ridunculus.com/sora_yori_mo_tooi_basho_ostchx6e.pdfIn PDF document text
    • http://milanbeachs.space/3648964724ar5iq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9bdb63b-3790-4235-80ed-1ce09f159112/dymo_letratag_100h_label_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efc945c-ab28-43b2-b298-c159fe27f4dd/samsung_50_smart_4k_ultra_hd_hdr_led_tv.pdfIn PDF document text
    • http://demuremapinob.epizy.com/annexure_h_passport.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ed47f2-b7c9-48f6-8b1a-2e2899b0f970/dusuzixexibuwojobano.pdfIn PDF document text
    • http://nolumer.rf.gd/87118596586.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_ed199e23bcdc4521b25847fae9fcace4.pdf?index=trueIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_921f0d6644c446769ec3e81af0b03ff8.pdf?index=trueIn PDF document text
    • http://vikitadutuxorus.rf.gd/what_does_the_word_truth_mean_in_hebrew.pdfIn PDF document text
    • http://lukugebov.rf.gd/aligning_with_your_higher_self.pdfIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_5531a5da17b54240870ab38beea43978.pdf?index=trueIn PDF document text
    • http://nisalufurawe.epizy.com/gomozukekut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb584c10-de05-4e53-b7d9-226f44491a5f/9803871083.pdfIn PDF document text
    • http://kebojupevanivi.rf.gd/52910663215.pdfIn PDF document text
    • http://rilasiwawizumo.rf.gd/inventory_cost_flow_assumptions_address_accounting_issues_except_when.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b3dc3c8-76fa-4f41-8f4c-4057a27e5a86/oracle_sql_dumps_for_certification_free_download.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_off00012969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12969 5308 bytes
SHA-256: 83b2844eafb7189802ae6dbe40e6b37e8740b998cfc699edbee5827a5ff42be0
font_01_sfnt_off00013b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5C 11348 bytes
SHA-256: 36e3f84a575b941194b3f0f8cd13bd7546cfef2612e578c44e8e3fe4f7aa85a7

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