Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a8ae0a3b7b555e…

MALICIOUS

PDF

35.8 KB Created: 2020-10-05 08:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c6adb2a650cb59fe572809a1da411ed6 SHA-1: acaea5a031750cf796fa62d5ffea46fbec7b33a3 SHA-256: 53a8ae0a3b7b555e58ba347a5785a9aa1cc94916a2dc6de1fc10cd9367cf3ddc
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=super+mario+flash+unblocked In PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/9544188210.pdfIn PDF document text
    • https://site-1036746.mozfiles.com/files/1036746/92478584018.pdfIn PDF document text
    • https://site-1048221.mozfiles.com/files/1048221/turikidowizaxobuvewar.pdfIn PDF document text
    • https://site-1036920.mozfiles.com/files/1036920/20812414575.pdfIn PDF document text
    • https://site-1041489.mozfiles.com/files/1041489/99076120106.pdfIn PDF document text
    • http://files.stemonline.org/uploads/1/3/1/1/131164081/gidobenumeji_zavomelazezize_gazesudif_pimimak.pdfIn PDF document text
    • http://dapizi.pickenschamberofcommerce.com/uploads/1/3/1/3/131378850/7126959.pdfIn PDF document text
    • http://files.lighthouseontheprairie.com/uploads/1/3/1/4/131452753/semadulevusuxe.pdfIn PDF document text
    • http://zojow.lifefashionfun.com/uploads/1/3/2/6/132680813/b8ba40b.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/f80079fb-b92c-4abc-91e5-633c6611fea1/70070323933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d1757f-1d7d-4415-9e1e-1685548175be/wedujuwozexox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/072a7ce2-f5cb-4bb9-8ba9-71ff4bb905ed/nowasogimeteburuxonigifej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/333bed73-bcea-4bdc-b77e-3ac30caa9a8c/91250770159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5412c677-cdbc-4ff2-83ec-89f22a9b21ec/kevuwakipur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8365/9419/files/8_ball_pool_hack_online_-_how_to_get_unlimited_cash_and_coins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3616/3747/files/boy_scout_rank_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2973/2245/files/yamaha_av_receiver_manual.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_off00004e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1A 5704 bytes
SHA-256: 8b3b7e2bf579b7ffa7a53b9b04c11b959ef4154e44acbc3a5e742b54bb532992
font_01_sfnt_off00006152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 9808 bytes
SHA-256: 53dd33c51a5ca02daebf6799e3fe291a3fc8f0e01a709ad14dbe7d10c60582ca

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