Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea2e7706e57c069…

MALICIOUS

PDF

74.0 KB Created: 2021-04-11 17:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fb50b204dc5d7ace9486019475a317aa SHA-1: df7ac918bebc06c40e5345882995fabc868fae6f SHA-256: 6ea2e7706e57c0695ff1a1d347d57408beac1df6206a455d8d4f4400422c59cb
126 Risk Score

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 0.9997

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://dafemum.ru/strik?utm_term=brother+mfc-j5910dw+ink+absorber+full PDF link annotation
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://pirunumilusarib.sportsontheweb.net/libro_la_meta_resumen_por_capitulos.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/8hihhha/oklahoma_natural_gas_service_charge.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/lanamusen.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/96364051352.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/texto_em_ingles_com_traduo.pdfIn PDF document text
    • http://xenavowi.22web.org/nupipivugenokudi.pdfIn PDF document text
    • http://remontnatali.ru/goxogifowexigdksi5.pdfIn PDF document text
    • http://xuxikurov.mygamesonline.org/arthritis_back_exercises.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/72944712013.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/13395384213.pdfIn PDF document text
    • https://cdn.sqhk.co/rezejigobip/WswkLji/amiibo_mario_kart_8_cemu.pdfIn PDF document text
    • http://buzevuzelape.mywebcommunity.org/9125054469.pdfIn PDF document text
    • http://romakipojaxu.mygamesonline.org/33509682515.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_d82853d56e8e4db5942c7bc1f60de169.pdf?index=trueIn PDF document text
    • http://jogebupirenewid.rf.gd/42705460828.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_03163fa1054b4b51bea35ffce4e29443.pdf?index=trueIn PDF document text
    • http://gevejonitu.onlinewebshop.net/60149643264.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_bacc3af438314bbda835bfce5de99296.pdf?index=trueIn PDF document text
    • http://marakolin.epizy.com/neteritajudikopi.pdfIn PDF document text
    • https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_ee44ebe4f8a74106876c4b54268ca8c0.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA4 6188 bytes
SHA-256: edc8af05636ac8fce14792043da861be805154d5ba671fe72a4df6d8283143df
font_01_sfnt_off0000f2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A6 12176 bytes
SHA-256: d907767641031e3f7e5401f28d68e79dd23fa2faf393f71daad72bdc5bb789cc

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