Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c47b9500f315d7d…

MALICIOUS

PDF

67.9 KB Created: 2021-03-14 01:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2788a12e54e5d9a759ad4648be110c3c SHA-1: 175aac8211584e49b1777d0dec59aaaf7eb00aa1 SHA-256: 9c47b9500f315d7df90d0ddc2b999f76f3f4217885efc81dcda2c82005143480
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 0.9998

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://resalured.ru/123?utm_term=charter+club+sheets+twin+xl PDF link annotation
    • http://mawosatejojeka.sportsontheweb.net/90751193404.pdfIn PDF document text
    • https://cdn.sqhk.co/muxaferamet/Uq9jiL7/88081301057.pdfIn PDF document text
    • https://cdn.sqhk.co/mubogasaven/TieGUgc/77439731768.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/how_to_use_the_mini_keurig.pdfIn PDF document text
    • http://xaxibosem.22web.org/student_assignment_planner_template_excel.pdfIn PDF document text
    • http://pisumuvate.sportsontheweb.net/hypertensive_heart_disease.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/iltPCKe/boo_a_madea_halloween_2016_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/rezejigobip/fibjahh/rurin.pdfIn PDF document text
    • http://momenujobig.22web.org/kofolofowitufanisos.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/d56920b3-793a-49f4-af23-12bb61422b3f/weber_spirit_2_e310_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e6e1487-fcfb-4c94-950b-d4e24f3163ac/final_fantasy_15_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ad09e9-3aa5-452b-8929-8d8fe18533b9/43857228597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f148e4-21d4-43c5-a7ed-e223f135c1ab/mirovomevobugexipiw.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/yamaha_rx-v377_speaker_setup.pdfIn PDF document text
    • http://tozibuxadotoba.epizy.com/74682770045.pdfIn PDF document text
    • http://xalesikejuxo.epizy.com/99296483616.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/uc_browser_for_nokia_210.pdfIn PDF document text
    • http://davafegi.epizy.com/kadubunazuzebugas.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_off0000cd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD72 5092 bytes
SHA-256: fd3328e34edb9d34ba9024abb34c0236270aab44c02ed5d66c17333c23058c28
font_01_sfnt_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 10572 bytes
SHA-256: 1d29fc79dfed648d608f2383b426effea0cf8b52ef76a038939d5bc003d81f16

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