Malicious PDF — malware analysis report

Static analysis result for SHA-256 43dc449e32d9d4c8…

MALICIOUS

PDF

79.9 KB Created: 2021-03-12 12:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a17bd6ddbc7d13be27c03607892b791d SHA-1: 9a63e1883bafe25d062ca01ac41c57ae7ff13c67 SHA-256: 43dc449e32d9d4c86746a9ed62fd52fc38be33b1849cdcc41f9d3dfa1760f828
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 0.9994

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://midufefew.ru/123?utm_term=yaml+auto+format+vscode PDF link annotation
    • http://sayfelengs.space/zimotefuzulariguvagamob73vw.pdfIn PDF document text
    • http://jijawaxasaxipaj.22web.org/acgih_industrial_ventilation_manual_27th_edition.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/vojadogixovup.pdfIn PDF document text
    • http://afracheat4.xyz/bidafe3xato.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/fifty_shades_freed_movie_where_to_watch.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/general_anaesthesia_surgical_procedure.pdfIn PDF document text
    • http://stc-l.ru/nicalis_store_couponmxqgy.pdfIn PDF document text
    • http://tasiperop.medianewsonline.com/55404935090.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/array_in_python.pdfIn PDF document text
    • http://tasezupu.22web.org/apostrophes_for_possession_worksheet.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/la_clavicula_de_salomon_resumen.pdfIn PDF document text
    • http://duvejajenivogik.getenjoyment.net/samsung_rfg297hdrs_owners_manual.pdfIn PDF document text
    • http://xulazawelinuze.scienceontheweb.net/el_politico_baltasar_gracian.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/konica_206_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f52783-e7de-4f88-b333-e17f9cafd5ce/wosewaxilesuma.pdfIn PDF document text
    • http://wutireliwuz.epizy.com/starship_troopers_book_cover.pdfIn PDF document text
    • http://jufomotapi.epizy.com/broeders_reform_oosterhout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3eeee94-d2c0-49a4-9dba-d3b1626dc30d/biggest_stock_markets_in_the_world_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cdcec90-8859-4110-a426-16da8f74076e/what_is_a_diverse_learning_community_in_school.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/business_cards_templates_free_printables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee34d7e-4bce-47e7-9f23-169f37901d4c/irobot_roomba_i7_7550_review.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/57689870718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a1178b-be95-452a-a0cd-dc8ab10ae0f4/que_significa_tener_un_estilo_de_vida_saludable_segun_la_oms.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_off0000fa26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA26 5188 bytes
SHA-256: 0e5b3f3fba733eb1d466b9f27f0374bfcf77e7ecbebdd503c5bc3f12f825c54e
font_01_sfnt_off00010bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBF 11252 bytes
SHA-256: 3e5dc6c73e120c6d66f0ac8a92d34b564cb9c4dd8ff293b7e74facd6142d277f

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