Malicious PDF — malware analysis report

Static analysis result for SHA-256 59261ae5f15a8662…

MALICIOUS

PDF

79.8 KB Created: 2021-03-06 05:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 982ebb24193b0d1791b2ce9fc262f72c SHA-1: e48efffe80c50656f9f22cb2ba5f1450a067f1e1 SHA-256: 59261ae5f15a866292e346d3e91c50856d51bfc24d208e79a38129b491a7c613
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=what+bible+says+about+time+of+death+penalty PDF link annotation
    • http://mon-cmb.best/704151364094cm33.pdfIn PDF document text
    • http://titanovyi-filtr.ru/weber_gas_grill_replacement_parts_lowes39hkc.pdfIn PDF document text
    • http://bluhgang.best/zakumubekyew3c.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/quantos_litros_de_sangue_tem_um_porcsgc5w.pdfIn PDF document text
    • http://reawont.online/panetuwinitumejukedujufty8.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/Uhd7ggF/golavuseful.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/ghRif0X/toggle_on_off_switch_circuit.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/gajbXgj/98124662776.pdfIn PDF document text
    • http://indonesia2health.online/63427321341yg87f.pdfIn PDF document text
    • http://mailedflkf.site/soundpeats_true_wireless_earbuds_not_pairing_together59isr.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/96395934097.pdfIn PDF document text
    • http://tronreserve.online/95245453936ix9ic.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/6weunJ3/race_road_color_ball_star_3d.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/a41cc6f8-c4c6-46d2-a0d0-4aaa6fa13f7f/york_exercise_bike_display_not_working.pdfIn PDF document text
    • http://perabojon.rf.gd/welding_symbols_test_section_1_answer_key.pdfIn PDF document text
    • http://muxibiw.epizy.com/examples_of_organisms_that_perform_cellular_respiration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/309cac88-4c8c-43b6-b373-808a13c9fed5/how_do_i_connect_my_hp_photosmart_c4700_printer_to_wifi.pdfIn PDF document text
    • http://telifujovemevo.atwebpages.com/tonokasezasuwixuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ce4480-9946-43bf-a50c-1adf977ab610/how_long_to_build_a_website_with_wordpress.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/97699499599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fcbd5b-1f55-47d8-b5e5-ae734d76b115/what_is_the_fuel_mileage_of_a_prevost_motorhome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834b09a9-f599-490f-a444-81a0f5d6f5d8/how_to_disassemble_dyson_dc59_motorhead.pdfIn PDF document text
    • http://xogijowag.onlinewebshop.net/56597270283.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_off0000faa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA4 5440 bytes
SHA-256: 7cdd5d6427b531dc9ecf317d557692659ffc6deeb94a70d2d4e6f627c12af9c8
font_01_sfnt_off00010d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D10 10672 bytes
SHA-256: f1f821267916400fe1a136408d8da39a528af4cec6723f16b6fab37592561e75

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