Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0bee3acf068dcc…

MALICIOUS

PDF

74.8 KB Created: 2021-03-03 12:08:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d7edce8cb48e120064658e6af1825088 SHA-1: 281a32b08472c54ca31d7ae83bcdb0ad5d705234 SHA-256: 6c0bee3acf068dccb1b66930e0c6fcb67eb9ab1c4a2a0504f38703363eb1f468
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://crophysi.ru/award?keyword=the+cask+of+amontillado+questions In PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/3691188414.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/19060018063.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/lunisevajadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_602aa22b84244.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/1309156248.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420459/normal_5fcafd873c6c8.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/konosuba_light_novel_download_epub.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/how_do_you_describe_a_beach.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/c_language_printf.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/jiEuIgh/vadunifog.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/36271176899.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484605/normal_600576dd84f9f.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/hp_p2035n_printer_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489593/normal_5fe72fb2b9daa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuzuxutetug.atwebpages.com/keurig_model_k40_filter.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_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 5304 bytes
SHA-256: 1741b259243debb5f6be1816d258d4e2507e0aab84dbf3f21c3f02cf3245b7f9
font_01_sfnt_off0000fbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD6 10160 bytes
SHA-256: 6bab432bad7302e905be8028cdbe9f8d07501850e711f9a9de82241178c5528f