Malicious PDF — malware analysis report

Static analysis result for SHA-256 53eff4bc012ad899…

MALICIOUS

PDF

65.6 KB Created: 2020-12-22 07:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 96da1c53517be3e40133e27047e48ad6 SHA-1: c2259a16b7a6cfaed6699c31be6026da62f6a4ae SHA-256: 53eff4bc012ad899e79e24f44fd1cd19555d0b9080c8738f96628ee7ef2aedf6
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/123?utm_term=brutal+critical+dnd+5e In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5fa3900fbb831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5fd3573534c19.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/bitajemisajoz/xawaxinelijorefirupej.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/ahsanul_hidaya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d7d030-012c-45a7-9353-a5067bfb07eb/formula_for_propagation_speed.pdfIn PDF document text
    • https://s3.amazonaws.com/kalufizefem/tamaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/awakened_wyldwood_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/android_autofillhint_values.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/licking_valley_high_school_address.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/home_page_template_in_bootstrap.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/vawevimapenemazorusevarun.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/ranukuzumamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097cc7b4-000b-4440-896a-4a8dbde8d34f/29528246337.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/best_sound_analyzer_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1cdb28-da5e-4f57-b6e3-74432cc3a7bd/45469690082.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_off0000c52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52A 4928 bytes
SHA-256: f61e7638c34b8b0c8c5add03ee9fbb1aa6db9326cc95941fdee29b8a1771fb7b
font_01_sfnt_off0000d5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FA 10484 bytes
SHA-256: c1023140b1133d89eb5c3995442e1d1c46fc819c51b4a9392dde6c8a8b7c3574