Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3129d533cc4537…

MALICIOUS

PDF

72.1 KB Created: 2021-02-16 04:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1fd5afd109d7efa02fd70c64f429ee27 SHA-1: e3d406343561a4afe82c6da00eb2702dd4f62ad5 SHA-256: 2b3129d533cc4537153193fc054f28844333c1e8b347f581d29bd366af1276f0
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://yafferge.ru/123?utm_term=cooking+times+for+showtime+rotisserie In PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/biluzapuzuzenow.pdfIn PDF document text
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/mizukuzepunuwik_viwopo_sokobojagu_bajefinisoguna.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/gjji4hd/44024957544.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/VIgi5gd/libixilotatutitevepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_600c6e70219ef.pdfIn PDF document text
    • https://zesudegefomoga.weebly.com/uploads/1/3/1/0/131070027/pulazuxili.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/ji3hewG/99539483927.pdfIn PDF document text
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/2c51adf.pdfIn PDF document text
    • https://cdn.sqhk.co/vopokemib/phfijes/the_last_stand_update_l4d2.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/odIieL0/wallpaper_hd_4k_for_pc.pdfIn PDF document text
    • https://tenimuleletef.weebly.com/uploads/1/3/4/3/134343202/nupexiwemitidijafis.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/anAhgha/82292514620.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/jevopemosod/59134436438.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/tifuwixovoramesopuboze.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/guwetidavexo.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_off0000def5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF5 5000 bytes
SHA-256: 777c9e471bb72cf4bb513e308ec1e3460df2d9cc7560230bd49ea93ebd048a69
font_01_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 10440 bytes
SHA-256: 85e2e2477353118b36cf79f706b58132e19ec52fde0dbe2a226feae6bc4e1060

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