Malicious PDF — malware analysis report

Static analysis result for SHA-256 619ff09a35dadb93…

MALICIOUS

PDF

64.0 KB Created: 2021-03-02 02:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cb2792e7b1474ec78aa8e25b7a98c188 SHA-1: daf134d5f1782d9a675bfa0b32d2f956ac3d896a SHA-256: 619ff09a35dadb932f8dc7d4415a1ee624a67ba67e99c200a13013a40e418dba
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://mezovuduw.ru/award?keyword=cellular+and+molecular+immunology+9th+edition+amazon PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372376/normal_5ff1db9eeea73.pdfIn PDF document text
    • https://cdn.sqhk.co/guzorata/Zhijdjf/sling_tv_channels_list_blue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_601a7e70ad960.pdfIn PDF document text
    • https://cdn.sqhk.co/waladoved/jsF2hcH/titavupotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5fe7dd10705ae.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/godewumazek/adobe_scan_premium_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/wofivowivelobubojugowasu.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/47587300369.pdfIn PDF document text
    • http://rugokabiko.epizy.com/latest_software_update_for_iphone_6.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/balesizesiguxudu.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/fjllrven_polar_guide_parka_herr.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/80953122372.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_off0000be9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9D 5388 bytes
SHA-256: cb9c5971a4e9b38a074d98e4899da5e621c405326f0bfe0d0104f767804d5670
font_01_sfnt_off0000d0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CE 10176 bytes
SHA-256: 1d3aa6d5483a8fccecb12f461005ad97a2dde084dd013cb06c66fae943db5843

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