Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c4f2618f28809f…

MALICIOUS

PDF

64.3 KB Created: 2021-01-21 14:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 73d26d10f58174ea599f506bc234eb2f SHA-1: 03276e39f5f2e8cd1eb572165c892d9c4e0c1f86 SHA-256: 92c4f2618f28809f5ca66d73637ef9c3a63ade8bde4117f5913d716f9d14d495
136 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/123?utm_term=vanity+fair+confidential+episode+guide PDF link annotation
    • https://site-1176782.mozfiles.com/files/1176782/72984567957.pdfIn PDF document text
    • https://site-1177942.mozfiles.com/files/1177942/e__v__s_worksheets_for_grade_1.pdfIn PDF document text
    • https://site-1227582.mozfiles.com/files/1227582/tor_browser_ios_app.pdfIn PDF document text
    • https://site-1174988.mozfiles.com/files/1174988/vadafakatajepika.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_5f9ada7c6e508.pdfIn PDF document text
    • https://cdn.sqhk.co/difotolu/icjgPhg/10624320004.pdfIn PDF document text
    • https://site-1211863.mozfiles.com/files/1211863/96659820783.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/c6wFheT/snapchat_icon_meanings_two_pink_hearts.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/gc0OMhf/zuluvomeledoledadagajapu.pdfIn PDF document text
    • https://site-1178232.mozfiles.com/files/1178232/pazolakeju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422884/normal_5ffe7a7c97873.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/diigco3/64302449721.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/lovomijelun/lizekepixesug.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/90327290136.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/puvuloluwidijonefub.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/60760055514.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/78826606998.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/unisa_nsfas_application_form_2018.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_off0000bebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBF 5392 bytes
SHA-256: c4734a87a008dc29d9da21b44b0cfb751006c593547c3ea370cac8d74988fa80
font_01_sfnt_off0000d133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD133 10148 bytes
SHA-256: 9466101761df53322b708d93ba5ddcc50e6a23de04b33d0b99e115989a484d5b