Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ec1521ef7a973a…

MALICIOUS

PDF

70.7 KB Created: 2021-04-26 17:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 103e9d27a9a07233ee7b498a2ea8ec5c SHA-1: 8a2ccd1da648ca101df6d017d9176556634c23ff SHA-256: a6ec1521ef7a973a3d926ac6675b94c21522252000203e391f40ce52080c5554
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-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://crophysi.ru/strik?utm_term=samsung+sm-t350+case PDF link annotation
    • http://zuvatewovu.scienceontheweb.net/alphanumeric_reasoning_questions.pdfIn PDF document text
    • http://leree6.club/33142746136b5noy.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/b_com_accounting_and_finance_books.pdfIn PDF document text
    • http://yozi.store/transitive_and_intransitive_verbs_testv1cm5.pdfIn PDF document text
    • http://katermore.ru/95465692717lg4db.pdfIn PDF document text
    • https://nezasitize.weebly.com/uploads/1/3/5/3/135303973/4e47175223a.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/novela_el_alquimista_de_paulo_coelho_resumen.pdfIn PDF document text
    • http://xebubux.sportsontheweb.net/how_much_is_a_metal_carport.pdfIn PDF document text
    • http://homiak.fun/project_management_salary_florida9mlvw.pdfIn PDF document text
    • http://llloooodddd.space/342356350742bv8v.pdfIn PDF document text
    • http://tehnikator.ru/givutasuwigufyj361.pdfIn PDF document text
    • http://pagebake.com/song_lyrics_how_great_thou_art_elvis_presleycg7j9.pdfIn PDF document text
    • http://hisgohar.site/9424923612866sp3.pdfIn PDF document text
    • http://meetcabinets.xyz/botazuxakaravolidepsjpq8.pdfIn PDF document text
    • https://viweruvuwoloti.weebly.com/uploads/1/3/4/5/134577653/8063852.pdfIn PDF document text
    • https://vawanateriti.weebly.com/uploads/1/3/0/9/130969814/3872958.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/5ab6a0e8-cda4-4bc6-b07c-86c0f67dd2e3/information_security_awareness_training_ppt.pdfIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/calibration_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13e37ee0-086e-40ce-9209-73eef3c86f0c/how_to_write_script_for_short_film_in_tamil.pdfIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/88095078006.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E8 5556 bytes
SHA-256: b083f31620b8df7d95faab99c49ab09abbe952e5dfde7954aee5401894774df7
font_01_sfnt_off0000e5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C8 11276 bytes
SHA-256: 482243a860404e5e8943f8d0ba64c7e9c7c8865b3a237c6ce71fb2a7d34a7687

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