Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e25bfb82a1fb9e…

MALICIOUS

PDF

37.9 KB Created: 2020-10-10 13:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c87b3678b9817c03abfc26632ea070cb SHA-1: 6a81f71d8c5e899ffe128cc794a884dedfa9ef2e SHA-256: 66e25bfb82a1fb9e91c3f62ee3d454acce410795cd251448869c750dbf030fee
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/strik?keyword=raaz+2002+mp3 In PDF document text
    • https://site-1040571.mozfiles.com/files/1040571/28820654859.pdfIn PDF document text
    • https://site-1043294.mozfiles.com/files/1043294/68747665451.pdfIn PDF document text
    • https://site-1038744.mozfiles.com/files/1038744/nekutifukosagadevafisepe.pdfIn PDF document text
    • https://site-1037867.mozfiles.com/files/1037867/35272529759.pdfIn PDF document text
    • http://tawokefit.capitalpollinatornetwork.com/uploads/1/3/1/4/131453170/e57551.pdfIn PDF document text
    • http://tidoniz.pygmalionhousedesign.com/uploads/1/3/0/7/130739098/7037094.pdfIn PDF document text
    • http://files.sevenstarsamerica.org/uploads/1/3/1/3/131381946/b611fbf946e4c.pdfIn PDF document text
    • http://jidivixi.mrswhitesclass.com/uploads/1/3/1/3/131383510/xadifipapiduwefom.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/de1b47d2-075b-4359-b8f5-7f5bf158ef06/zudovunefigubeloderin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ef4218-cc8b-49da-870b-4520cb23dcab/91370628056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9004286b-8cb2-4963-a347-8e1e54def3d2/76619650203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6bb45b-f0b5-4c46-9b1f-02b20c1bea9a/23397887394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db14a040-7ee7-436f-96b5-057889c483cd/fizisuzub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d56806c-723c-4ba8-b7f5-54a4ada3b52d/xumumiwuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7827f4-0370-4afb-84e3-19abc298ec63/67454013139.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_off00004f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F45 5152 bytes
SHA-256: 38fe5a89c9853b539f2f905779c66d4a08d4a76d13d17573cabd69598879b8d4
font_01_sfnt_off000060c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C1 13668 bytes
SHA-256: 340fa36051403f8a06585b39b110c71a8222dbbf800a8833228eb3384f80fd98

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