Malicious PDF — malware analysis report

Static analysis result for SHA-256 2964adeab2469913…

MALICIOUS

PDF

83.2 KB Created: 2021-05-16 08:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 54d2dfc21b6db52715e08043404d15ef SHA-1: ad8735f02ee2ac6a17af43f1df446a6fa05756e3 SHA-256: 2964adeab2469913ed7932c5d3f75989dd50bd480d1b764bcbdbb0421c9694fd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=skyrim+early+game+strategy PDF link annotation
    • http://ruwaxidalemib.iblogger.org/15731321833.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_cc172287184d4b619b8260cc1907150c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c272a411-8eed-4d08-b0aa-6395433f0b64/15539738315.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/gesotovunuwazotilopaxomeb.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/32854907743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d1b0ab-103e-4485-b2db-0e0eeffdfcba/how_to_answer_questions_like_why_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d8a7a3-9f82-4b44-b07d-a22c687bd975/49292985586.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/how_to_eat_healthy_on_a_low_budget.pdfIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_794be00ad2154daa9f8660b870a65eb7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/768aea44-fa39-4345-b511-3fb63355bf6b/7028534104.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/business_request_letter_sample.pdfIn PDF document text
    • http://bowuxok.epizy.com/how_do_i_reset_my_motorola_baby_monitor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b0e79f-dba6-4f7b-98cf-d8943571d010/is_30-06_ammo_hard_to_find.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/python_range_step_without_stop.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/wetagofe.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/red_lobster_kung_pao_noodles_nutrition_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/disney_world_calendar_november_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/58841581416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be3dfe5-6afe-4236-8082-0cd5ac88902d/kenmore_dishwasher_model_665_manual.pdfIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_931adc45cb214a4da423824a45166e5b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c76b0f-04b1-4f1f-9073-1c13515ec22f/pequeo_resumen_del_libro_el_conde_de_montecristo.pdfIn PDF document text
    • http://vutitogox.epizy.com/orientacin_autopsquica_y_alopsquica.pdfIn PDF document text
    • http://midelex.epizy.com/herramientas_de_calidad_total.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_off0001082b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 5276 bytes
SHA-256: 5d4b1f96d8d306907137750a068d5fe0d665088ab449dbc6cd1ced6518dfb432
font_01_sfnt_off00011a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0D 11012 bytes
SHA-256: db070ec1c4bf79b5b0970578be8dc2da6a1b0b97b2a98949dce1adbe3237e6b0

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