Malicious PDF — malware analysis report

Static analysis result for SHA-256 5551b749ae18094e…

MALICIOUS

PDF

73.2 KB Created: 2021-02-28 07:33:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 00c932034ab74244ac5f414f38a37186 SHA-1: 86649ff6e9b8cd9a7abcf1c34b19b3e313bcba80 SHA-256: 5551b749ae18094e0d0c03f786acbf10ba51ca915529fa5c911667443b331d4c
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=beretta+m9+holster+safariland In PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/2709502486.pdfIn PDF document text
    • https://cdn.sqhk.co/waketeni/jgjjtge/td_bank_ny_locations.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/6461660930.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/4728165cb3.pdfIn PDF document text
    • https://cdn.sqhk.co/boxumiza/jhcgdgg/influenced_by_the_nationalist_movement_in_hungary.pdfIn PDF document text
    • http://xekepova.iblogger.org/navien_tankless_water_heater_purchase.pdfIn PDF document text
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/ea7912.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/sennheiser_ew_100-eng_g3_wireless_microphone_set.pdfIn PDF document text
    • https://nekazexupogufeg.weebly.com/uploads/1/3/1/4/131454238/5fe25.pdfIn PDF document text
    • https://cdn.sqhk.co/delinilipo/ijgjtrB/14464500144.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/eicD8Nx/24717409078.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/jagux/daligelixik.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/binomial_distribution_and_normal_distribution.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/ielts_formal_letter_format_sample.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD734 2960 bytes
SHA-256: ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b
font_01_sfnt_off0000e1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B7 5352 bytes
SHA-256: 8f37702b5fd4cf9448bc5c71e31cd31772daef133e9bb98383eeb4af0f573188
font_02_sfnt_off0000f3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BD 10384 bytes
SHA-256: d8fd5f1a4b26097ff0bab6ac135afc8e6d8fa1d9c325e46397750cbca7c152e7