Malicious PDF — malware analysis report

Static analysis result for SHA-256 8689d11d125378e7…

MALICIOUS

PDF

80.6 KB Created: 2021-03-25 08:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 802aaf3913563cd7cb90340f85ec1cc9 SHA-1: cc722ada811b2ef3e7962c0f928d161bbfd813bd SHA-256: 8689d11d125378e76d51dc9f2419025469b3220b9dcc8e9a4e4a170107473fca
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, with one pointing to 'soxebez.ru', suggesting a phishing or SEO manipulation attempt. Although no scripts were explicitly extracted, the presence of external links and the ClamAV detection as 'Pdf.Phishing.Trojan' indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://soxebez.ru/123?utm_term=alicia+keys+all+songs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5fc806f322cf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_6055ce6be169a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422148/normal_604f74735214c.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/tekotefib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474191/normal_5ffb90e484e40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480748/normal_602a53804c0e2.pdfIn PDF document text
    • http://suvekitubexeso.getenjoyment.net/1785860938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450424/normal_603cc324d51c1.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/nonejujuguturutedemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460473/normal_5fcba0ff33660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477910/normal_601a7f1047627.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/78f699e5-e937-4924-af42-a684cc897a60/canon_powershot_elph_170_is_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92579797-14f2-424f-8a60-5159b7f675ee/inkscape_png_to_svg_converter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da0e2945-9681-41ae-86e5-e179c833d436/2014_maserati_granturismo_mc_stradale_0-60.pdfIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_554b5b47c159479988f22091bc9db4ca.pdf?index=trueIn PDF document text
    • http://bixozebaxikapos.atwebpages.com/bstc_old_paper_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13cfed6-20a2-40d9-826b-ac3424cbbdfa/denon_avr-3808ci_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49319572-4daa-495b-bb39-2408f5e00520/89775075686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/360908e9-a7d8-4157-88cb-125e05d89785/how_do_you_reset_a_dewalt_battery.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/how_to_tell_if_golf_cart_solenoid_is_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b535d188-9860-4212-9091-1854cb5e2e1d/how_to_connect_bluetooth_to_jvc_kw-r910bt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185bbba0-1ec5-434a-abda-d7f6c615bb84/bronx_masquerade_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5889914e-048a-4887-b25a-0203a6226da5/2d_shapes_worksheets_for_grade_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e276a44-ac75-4df0-bda2-80b6e75d9580/problem_solution_text_structure_video.pdfIn PDF document text
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_7082f3e1d4454cb58ff15afed90eac1d.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_off0000fc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0A 5024 bytes
SHA-256: 8b36bc89d15785b774961bc91291b0abfd92ecb4df138426b2c19de5a833e6d7
font_01_sfnt_off00010d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D48 11564 bytes
SHA-256: 88fe59599e7fc9045e0645d05b8488e6c8e720d28c2d7b7df9e022312a4ab5de