Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4aa0af754d86df…

MALICIOUS

PDF

59.2 KB Created: 2021-02-10 17:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c3bbdb8790a5130f0e0c0bac9ea52df1 SHA-1: c2983ab606f51d22c2ee41e41a561dff6eef1f64 SHA-256: cc4aa0af754d86dff0fe143aa9ce8bb8ea645389e6e0ff482af3d16cee8693eb
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=informe%20auditoria%20ambiental%20ejemplo In PDF document text
    • http://f1l3download.site/nfl_injury_report_week_4_updatesy4kxe.pdfIn PDF document text
    • http://springwin.space/lekenolibotwdsmx.pdfIn PDF document text
    • http://popularchoice.space/227291029158jv5f.pdfIn PDF document text
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/6512323.pdfIn PDF document text
    • http://olx-delivery.cc/daggerfall_guideai8xf.pdfIn PDF document text
    • https://cdn.sqhk.co/jobezivozuf/UjarhcD/anthill_farms_pinot_noir_north_coast.pdfIn PDF document text
    • http://hookup756.fun/8246439077r14g.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/jgyROhf/youtube_yoga_with_adriene_sadness.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390382/normal_5fde6126e240f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426280/normal_5fc97b5f05a72.pdfIn PDF document text
    • http://myluckybet.xyz/australia_student_visa_checklistql8du.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366359/normal_5ffb5a2a219ee.pdfIn PDF document text
    • http://azalea.store/40862835201e0z43.pdfIn PDF document text
    • http://moitender.org/somexerabadibamezamakonhn5s.pdfIn PDF document text
    • http://mp4.design/84522902299u456e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB112 5160 bytes
SHA-256: 927ef090c336b24df50ba2f9988f499c6edf98c7028c907b5000584305d10749
font_01_sfnt_off0000c288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC288 8976 bytes
SHA-256: 61ff730c45124729c86b225507858652615e99acf2feaf01616f57c4ee1420d3