Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce27822497e9e8e0…

MALICIOUS

PDF

81.2 KB Created: 2021-03-08 12:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3242a87dbfd51de73b5f75d9db61d07b SHA-1: b6c1b109649dd3b1b8413fdb212c9d5707524ecf SHA-256: ce27822497e9e8e06249929da40ad53535aeaf9a6851972e2045609b4de9b9fe
186 Risk Score

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 0.9997

Heuristics 6

  • 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.
  • 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://seumenha.ru/strik?utm_term=how+to+configure+motorola+sbg6580 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368956/normal_6028399e85f4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462354/normal_5fe0534fcf2b8.pdfIn PDF document text
    • http://gasorutika.iblogger.org/texas_instruments_ba_ii_plus_tutorial_video.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408853/normal_5fcac90c594a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380237/normal_5fef98b323c74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481271/normal_6037dc5732218.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/crescent_head_surf_report.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/128fac12-cd34-4acc-b0b9-6a2c3fd85692/the_adventures_of_sherlock_holmes_tv_series_sinhala_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3674feeb-4af3-4c4a-a414-9ca6dadd6246/advanced_engineering_mathematics_by_erwin_kreyszig_flipkart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06a3865-723a-4b22-9c10-63caa3066989/94314356091.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/archaeology_6th_edition_kelly_free.pdfIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_ae3c21b09af9417390ef7e31bcb7fbb0.pdf?index=trueIn PDF document text
    • http://gagimuludodu.epizy.com/business_model_canvas_template_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45f6b12-3f69-4633-8267-6787e48526cf/manual_de_gestion_de_calidad_iso_9001.pdfIn PDF document text
    • http://jewezoku.epizy.com/rulupusuxivumarijut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb322090-002f-464b-86c7-0ef73c066159/reparto_de_la_pelicula_perdona_si_te_llamo_amor.pdfIn PDF document text
    • http://mukuraxoviniron.rf.gd/maze_runner_scorch_trials_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65bccc6-0788-4ed4-bcdd-7a13ffa2835d/yasar_nuri_ozturk_kac_yasinda_oldu.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/sony_bdp-bx350_remote_app.pdfIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_8a4876fa7e0845b8aee3f39f0643de89.pdf?index=trueIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_b535a09fc5384366bfd43d4d065c8e41.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_off0000ff63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF63 6008 bytes
SHA-256: fbbf0ee6d599eb2e0b64f65bec679849e5f1db5d77467e47301d94e8c83729e5
font_01_sfnt_off000113d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D6 10464 bytes
SHA-256: 95ea2d52c46f4b2becb4a64ee6eb65b66933b1cd529b44f81a19314d368daf1c