Malicious PDF — malware analysis report

Static analysis result for SHA-256 0585cd26a78c132c…

MALICIOUS

PDF

91.2 KB Created: 2021-03-25 15:13:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 337fcd9dffa5562762233c154df39263 SHA-1: 515074011cce6436a7991b347f6d015288cf2d2b SHA-256: 0585cd26a78c132c62a2b2a7ee75caaed3423f036274bf77bebe922f97d06792
126 Risk Score

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 0.9992

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://bologen.ru/award?keyword=deficiencia+de+vitamina+b12+causas+pdf PDF link annotation
    • http://findattime.com/argumentative_essay_with_introduction_body_and_conclusion_example40949.pdfIn PDF document text
    • http://opensalle.xyz/146433028319sw3k.pdfIn PDF document text
    • http://max-lifting.store/calories_in_indian_food_list_in_hindii73qq.pdfIn PDF document text
    • http://duwuzoruperiged.scienceontheweb.net/asclepius_wellness_product.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/products_of_crude_oil.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/42457713600.pdfIn PDF document text
    • http://haustova.com/lazusujubazupovokitaw6zwkv.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/risisipajole/the_smartest_guy_in_the_room_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcca3363-8e4f-4b65-bcf5-46bb6e5e9bcc/er_physician_jobs_colorado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853c7acc-f257-45f0-ab87-5a87375884b7/rotokanubuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f91dce0-1f33-42eb-a962-49c6bbbaf7bf/do_plants_need_cool_or_warm_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f791e3-90fe-4180-b14b-0fed3e8a7e23/tikosejidusebifamex.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/tewetoparaki.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/18135401229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc5f797-37dc-4c42-9abf-b3353cdfda37/grade_3_english_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242e372a-7c56-4129-ac45-df696a2dd8e3/xasadiwiximufeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/192741aa-cf37-4d75-b897-527d5a1691a7/putosam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12682e04-d950-44be-b804-ee76fae037aa/los_primeros_auxilios_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46922cc9-1bce-431e-a8ff-9fad25058086/fluke_networks_ms2-ttk_microscanner2_termination_test_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9d1e5c-3ccb-41db-913d-b3a1540c05e5/vogikuzubuxakudokaje.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/muzidonidigazafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb7876b-f1c4-4f85-8119-13b3bfd3f9eb/letatep.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/anatomy_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5e01c6-79f6-4a57-a6e5-b1eed846aea9/48378719588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfbe119-7388-4846-8f92-04528ba005ea/lista_de_verbos_irregulares_en_ingls_para_imprimir.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_off0001249a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249A 5556 bytes
SHA-256: 964e4ce3187e6f7ef0d03f53622a8c14db7eb04821fdef3892151f7979ff7622
font_01_sfnt_off00013787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13787 11540 bytes
SHA-256: 20d3c3af312d31ab4e4c1461d11b581359b47bc3ee6edc73cb5164daa60bbd64