Malicious PDF — malware analysis report

Static analysis result for SHA-256 36552f63f44780fc…

MALICIOUS

PDF

81.1 KB Created: 2021-03-15 22:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a6d43e35e9dd3e405e8c412d8f602b8d SHA-1: 81dc8dc0c6f33a69cb54596b51e4239b7fe4bee5 SHA-256: 36552f63f44780fc6e517483fc6343e9b4179ad4102546d795ef50e4e835cf0f
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 0.9997

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://golowaki.ru/strik?utm_term=what+is+gonadil+f+tablets PDF link annotation
    • http://pojibuvuj.mygamesonline.org/agaricus_subrufescens.pdfIn PDF document text
    • https://bevifosadorafot.weebly.com/uploads/1/3/1/8/131856546/4b6afa728.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/aprendizaje_autonomo_definicion.pdfIn PDF document text
    • http://bcipreactivaperu.com/cayenne_hybrid_2017_manualx298d.pdfIn PDF document text
    • https://jodowofimen.weebly.com/uploads/1/3/5/3/135330599/4892282.pdfIn PDF document text
    • http://vivadoctor.ru/how_do_you_fix_a_delta_single_handle_kitchen_faucet0wyd9.pdfIn PDF document text
    • http://apelsins.space/sukewosopifuxosorivwfrs.pdfIn PDF document text
    • http://leaninrzpd.site/197918993368thfv.pdfIn PDF document text
    • https://mabosuvix.weebly.com/uploads/1/3/4/8/134851695/nibifupewijozo.pdfIn PDF document text
    • https://juwufugoxeza.weebly.com/uploads/1/3/4/5/134528381/zusoso-vepoduxipadavu-nipegasepexe-tetizavodidajo.pdfIn PDF document text
    • https://xakelagus.weebly.com/uploads/1/3/3/9/133997825/lomoxagim.pdfIn PDF document text
    • http://reduslim-buy.site/70981518825q5syp.pdfIn PDF document text
    • http://flowerport.shop/cheat_engine_6._1_free_windows_10fue8m.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/91913722063kksph.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuputes.atwebpages.com/xazuzovuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3914241e-e57a-4604-9a1b-0cec9f763511/tazen.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/verbos_regulares_en_ingles_en_presente_pasado_futuro_y_espaol.pdfIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_999db3f400c7493b906e7199ae404cbe.pdf?index=trueIn PDF document text
    • http://vawirir.atwebpages.com/13863149747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032b95a0-d5dd-49e1-b6ee-9539ab906691/python_for_loop_increment_index_inside_loop.pdfIn PDF document text
    • https://36fde204-cda4-4268-899b-58717f9005d0.filesusr.com/ugd/b13063_c6c21464c3634338b6f7a6ba3ff4ea3b.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_off0001000b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000B 5228 bytes
SHA-256: 8ea1fc3552a5fd2d5c44bc87d6cb51fb9f372709ed0e66491da79decbbb9de74
font_01_sfnt_off000111e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E1 10860 bytes
SHA-256: c96ffaa789cb2fad1335f68285199adc5bc1f66cbbc3836b66c25496c460f138

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