Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee16e36e1280b6d…

MALICIOUS

PDF

79.9 KB Created: 2021-03-08 16:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7862e111d8cb271387e7ecdfb13125e5 SHA-1: 6fedca7e0ee09ec1d43aeb8ccf8362b80dc847e5 SHA-256: 7ee16e36e1280b6d43634c9ebf3cdaa39f390201abf587c96628c375d0a6d2af
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically pointing to 'xajibur.ru' and a query parameter suggesting a lure related to 'dublin airport flight information'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification confirm the malicious nature, likely for phishing or malware delivery.

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 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://xajibur.ru/123?utm_term=dublin+airport+flight+information+weather PDF link annotation
    • https://cdn.sqhk.co/pefevepufi/ja9hAjj/gwent_android_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447271/normal_60100019affbd.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/fhjUZij/11603192563.pdfIn PDF document text
    • https://cdn.sqhk.co/gevanadu/dWhjbhg/39142323475.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/j5jgjhk/cake_recipe_chocolate_coffee.pdfIn PDF document text
    • http://avtoshtorki.shop/66188304190vqfwg.pdfIn PDF document text
    • http://cookwellbakewell.com/ridozalumay8m.pdfIn PDF document text
    • http://apsdd54gfv.xyz/jogos_para_nintendo_switchoshya.pdfIn PDF document text
    • http://bluhgang.best/mirorufes2flj.pdfIn PDF document text
    • http://mugedly.xyz/how_do_i_say_hello_in_asl1vkl4.pdfIn PDF document text
    • http://gbo.guru/carl_zeiss_meditec_email_formatfa01v.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/iiq9MBd/xiwixiv.pdfIn PDF document text
    • http://shlifovka-pol.website/221088258663k2h8.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/superhero_mask_templates_printable2h6ia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_5fd65cdc075b3.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/2cd96fcd-13f9-4d00-908b-d4034518a740/lux_thermostat_tx9600ts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3662e395-367f-43a0-96b8-ffd009a06374/92150351853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac4a9bd-dcf6-4a74-b2c8-93e2816d6ff0/on_the_road_2012_full_movie_online_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41bbdf08-8bc7-4afd-b30e-ee5f31dbcf18/matlab_numerical_solution_of_ordinary_differential_equations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b35e553-7416-4f62-aad1-1942860ed7df/ingenuity_boutique_collection_smartsize_swing_and_rocker_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02840cfa-d9c0-469c-8d0a-b9770e5910a2/fibotatemob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bfa91ba-14a9-4668-aa4b-3db8ef756202/tres_metros_sobre_el_cielo_2_completa_en_espaol_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d44496-b9ea-4dc0-8a59-1cd8cde17e07/nusemetipobewolidoza.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_off0000f897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF897 5368 bytes
SHA-256: 283a3e0a6b665126a1985490c7349c241597ec27bed178f3349d2f3ba5b3bae9
font_01_sfnt_off00010ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC4 11664 bytes
SHA-256: 015075d5f74e972c11b7c9ffbec0b0ad3a4b71b58c147c7b354f8e98ad7165f1