Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db3e80bd2ee8f74…

MALICIOUS

PDF

78.2 KB Created: 2021-05-05 22:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4a0bd23c6850edb02a01e2f261786e91 SHA-1: 38e9f5585a3cf95cec9b6251771d1d4ef4d03990 SHA-256: 5db3e80bd2ee8f740fdf3b476cbb6f43b4ca269c5fe167ade6693d9c7a6b717c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to smoking a brisket, directing users to a suspicious domain. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=how+to+smoke+a+brisket+in+my+electric+smoker PDF link annotation
    • https://fodubimofo.weebly.com/uploads/1/3/4/8/134884763/b2d630ca10a.pdfIn PDF document text
    • http://shopwithsale.website/36395846367pzhv0.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/tejamemiwuzrsjwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482230/normal_5ff95e62c2cfb.pdfIn PDF document text
    • http://olymptrade.buzz/rpg_maker_mv_modern_urban_tilesetmagtj.pdfIn PDF document text
    • http://batovimogulovow.22web.org/pujuwam.pdfIn PDF document text
    • http://lnstagramsupportlives.com/teziripurapowawoxuve8q03g.pdfIn PDF document text
    • http://artelamp.store/mejufogebusirogaxenitezart8mkv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421460/normal_5fe05064eb5b6.pdfIn PDF document text
    • https://mudabomem.weebly.com/uploads/1/3/0/9/130969182/0429b395b.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/cb290f3b.pdfIn PDF document text
    • http://nulonelam.66ghz.com/selenium_server_guide.pdfIn PDF document text
    • http://itprod.space/regression_testing_script_templatenr2r5.pdfIn PDF document text
    • http://boost-shop.xyz/8495685158773ihz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5fd1786cd9e2a.pdfIn PDF document text
    • http://xamakag.iblogger.org/17675261011.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/eef16f33-dd4d-48d8-9b2d-4daef212d536/29131285952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5f6d91-dff3-4f4a-b34a-26fe32d66a5e/how_to_do_leg_extensions_at_home_with_bands.pdfIn PDF document text
    • http://vodoxaxadax.rf.gd/arifureta_web_novel_espaol.pdfIn PDF document text
    • http://dovanokeji.epizy.com/kerevefosezegemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8ab74b-a5d3-47b6-a705-0a8d7c7a160f/xadaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e7e4272-1f32-426a-bbe8-dcc53a738eec/verbos_en_ingles_traducidos_al_espaol_y_su_pronunciacion.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_off0000f402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF402 5304 bytes
SHA-256: 0d301cec4a56280da2ed931cfa0458ca72ddca078f9181f897b46e1a239d41ba
font_01_sfnt_off0001060b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 10848 bytes
SHA-256: bf5fe2e430e349d304ccba1906e9fed53bf9022d6b6a654a9d82e7c2e5779143

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