Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee99f017c7ab0c9…

MALICIOUS

PDF

67.8 KB Created: 2021-03-10 11:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4fe91d1f6fd795ba701a09979c1e53f0 SHA-1: ac433208cfeda5da1253a6bff4ead0139e687cbc SHA-256: 4ee99f017c7ab0c9c9c03a7b3558153e5039c4f9a7820c704fa3e0d8590f8377
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://vilenefex.ru/award?keyword=noun+phrase+quiz+pdf PDF link annotation
    • https://cdn.sqhk.co/xuzalolotagi/ijhjhhk/4358890581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fd5f2e09390f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490366/normal_6018a2afde9aa.pdfIn PDF document text
    • http://nilanudid.iblogger.org/29432567632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_6031bcb762ea8.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/bejulisok.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/jcgjjfU/zisuf.pdfIn PDF document text
    • http://rinobozawizuvew.iblogger.org/vewerek.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/gj8CGin/mr_bullet_feeder_parts.pdfIn PDF document text
    • https://tabugutiku.weebly.com/uploads/1/3/2/6/132682541/e762c3f32fe51.pdfIn PDF document text
    • https://mejotowud.weebly.com/uploads/1/3/0/9/130969644/vupanusepalupumi.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/wixanarer/what_is_genetically_modified_food_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ffc1345-4e1e-431e-a7ef-f69d5a472483/kenmore_90_series_gas_dryer_motor.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/ximegeku.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/35673225784.pdfIn PDF document text
    • http://kovusipeduza.epizy.com/66352493226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afb9d56a-076f-4049-8277-9bef13535e88/22473106018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/443bc810-becb-4884-9ed2-c7471c90a0e7/how_to_install_your_own_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/9832832963.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_off0000cdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD8 5240 bytes
SHA-256: 60a0b6d54934d2b97cd325580c2a924a09e9b268947d524561b3aa98192965a6
font_01_sfnt_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 10260 bytes
SHA-256: aa4a836be5a93bea7474c6c274ee4f2ef24425b165d6828eca8fe1b1d46df69c