Malicious PDF — malware analysis report

Static analysis result for SHA-256 59367cb4518ff926…

MALICIOUS

PDF

68.5 KB Created: 2021-02-16 08:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0442ce8016f7a44ce3bf9e3ad703f48f SHA-1: 068daf381624365a6a0bc0fdf80506895c2b35a8 SHA-256: 59367cb4518ff92699f7381a2cc826ac5afe8e25de9f1e8ce309fe47fb9b5a14
136 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
  • 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://jottigo.ru/wb?keyword=singapore%20math%20workbook%201a PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485930/normal_5fe534b42ee62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_6019d8610b5f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471512/normal_5fed79e18d0a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5fc7927f0acb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385415/normal_5fe39007871bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_60207f36070da.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/e01ghjj/65877939610.pdfIn PDF document text
    • https://cdn.sqhk.co/tomibigi/geEXgH1/hot_pink_tumblr_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458389/normal_602352db72a25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_602899e515eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454424/normal_6027edc377aa1.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/dhiWhbW/post_planner_app_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikadimakezazir.rf.gd/pcmark_for_android_battery_life_test.pdfIn PDF document text
    • http://mesuwepuru.epizy.com/55817033837.pdfIn PDF document text
    • http://bamoxogoxufoge.epizy.com/pivokib.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_off0000cfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEA 5476 bytes
SHA-256: 9aa94a6ac99e92be27d851878165a89e71e4041b06f317a46f5cff1631df88dd
font_01_sfnt_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 10388 bytes
SHA-256: 3b7b080f95519221c8e6d4a321d569dbebc9ad86f4afd8fc99541140be561c59