Malicious PDF — malware analysis report

Static analysis result for SHA-256 969a2b84b682f3cc…

MALICIOUS

PDF

76.2 KB Created: 2021-03-07 13:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0cba43d1340e4ddba7e0af9678b18871 SHA-1: 0f0d96555a0e553ee694f881838c50144132d490 SHA-256: 969a2b84b682f3cc85a55f8288a03659945ba659f38d341b8448decd6b2765de
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'link farm' heuristic indicate a strong intent to direct users off-site.

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://nipisod.ru/strik?utm_term=how+to+build+a+workout+training+program PDF link annotation
    • http://podarokinsta.online/how_do_animals_adapt_to_hot_dry_climateshqsox.pdfIn PDF document text
    • http://popularchoice.space/husky_4_gallon_air_compressor_price3o51h.pdfIn PDF document text
    • https://judesofuvedal.weebly.com/uploads/1/3/1/8/131857090/7813926.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/EIjEicx/ghost_rider_film_poster.pdfIn PDF document text
    • http://simupujumojata.22web.org/osi_model_layers_explained_ppt.pdfIn PDF document text
    • https://fiwebafifike.weebly.com/uploads/1/3/4/8/134885554/6105434.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/jehBldx/screen_recorder_no_watermark_apk.pdfIn PDF document text
    • http://onlineeshop24.xyz/10919833399i5ed0.pdfIn PDF document text
    • http://kanshoper.site/proud_mary_sheet_musicomo18.pdfIn PDF document text
    • http://zavuwoxek.22web.org/3d_shapes_worksheet_vertices_edges_faces.pdfIn PDF document text
    • http://copyright-rules-help.com/subefofotusulimitekbu0f2.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxazagugura/jcD2mhb/truth_or_dare_questions_for_friends.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/MUXgfIp/flight_simulator_games_online_free_unblocked.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/remavuj/budaya_hedonisme.pdfIn PDF document text
    • http://xifonefoje.epizy.com/vonigaweteluzenivuvikega.pdfIn PDF document text
    • http://weralawubuzeg.epizy.com/aplikasi_video_maker_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/juxas.pdfIn PDF document text
    • http://dekidad.epizy.com/bronchiolite_virale.pdfIn PDF document text
    • http://zibozepor.rf.gd/kiruzafe.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/cedars_upper_school_6th_form.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_off0000edad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAD 5360 bytes
SHA-256: c5812a904f1fd013d7ce931ca32e338c3a9b452a21a8dd3ac2b9f75293dbc150
font_01_sfnt_off0000ffe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE0 10420 bytes
SHA-256: 67c4a977794d7f250a76a3b6863b834d00d3fbe321aee6ba803cb37ed79fb4cb

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