Malicious PDF — malware analysis report

Static analysis result for SHA-256 f819d9cb9bf689b9…

MALICIOUS

PDF

64.2 KB Created: 2021-02-18 01:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 820f225b2df11c39c5d312bd87c673d8 SHA-1: e4e9e6c24e9884d6891427a0361b0966f4a52478 SHA-256: f819d9cb9bf689b9388b9f08ce6a3bd3f465ea609bdd1109667595704e99a412
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/wix?keyword=santa+run+3+mobile In PDF document text
    • http://testvvd.xyz/dancing_with_the_stars_season_18moanj.pdfIn PDF document text
    • http://lenorimageb.iblogger.org/rufiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_601f5bc2c7159.pdfIn PDF document text
    • http://pivogafude.22web.org/77221653334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5fde838c7fc60.pdfIn PDF document text
    • http://moxolesapudeli.22web.org/gantt_chart_template_apple.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_6026937b10c28.pdfIn PDF document text
    • http://remontvorot24.com/927844645516e61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5feb913de75e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ketanuviz.epizy.com/rifuri.pdfIn PDF document text
    • http://nomulumipal.rf.gd/chess_for_android_2._3._5.pdfIn PDF document text
    • http://nozovov.rf.gd/a._m._u_application_form_2019.pdfIn PDF document text
    • http://pexevogawi.epizy.com/73322220775.pdfIn PDF document text
    • http://ferodokibaw.epizy.com/10464851681.pdfIn PDF document text
    • http://mamisiz.rf.gd/57755245317.pdfIn PDF document text
    • http://nivitigu.epizy.com/vororewabulopunafe.pdfIn PDF document text
    • http://tabojiterakan.rf.gd/6678312176.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_off0000be76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE76 5060 bytes
SHA-256: 849015e8e1692a42631f9edf95fc763733fe824b60dcf0e7028744333b56f45f
font_01_sfnt_off0000cf96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF96 10268 bytes
SHA-256: a7da3569a62f5db5d3c8da122dfe390bf8ad3ff35261f4f532e3291fa257cc1f