Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb38b83e77ff6f86…

MALICIOUS

PDF

74.1 KB Created: 2021-01-19 10:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2ad48c5be3f31a45009f5fa10d9a15e4 SHA-1: 69388f9b1802de341276b7c64881976a139e6249 SHA-256: cb38b83e77ff6f86c8d5d348b70277a0d9940f1360ee3f6bf8a0256dbf9fbde2
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://crophysi.ru/wb?keyword=dark%20quest%202%20xbox%20review In PDF document text
    • http://padugozerur.22web.org/cantonese_pinyin_input.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/fhiKje6/asteroid_news_2020_29_april.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370055/normal_5fe0ae17b12aa.pdfIn PDF document text
    • https://cdn.sqhk.co/tolebilu/7CRidjj/eternium_guide_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/jzhgiex/70892758326.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/hjdhirA/gowuxivivizunexurogakawu.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokoze/jOziihi/strategy_proposal_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/hie8jcH/calculator_online_free_full_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/simunenij/gc5NifN/rarowofokosimibimufazan.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/bagokiko/vedusulorimamubi.pdfIn PDF document text
    • http://bavidoripo.epizy.com/82057354583.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/dobij.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/75742100264.pdfIn PDF document text
    • http://daxepusiz.rf.gd/50350969084.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/womobek.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_off0000e385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 5328 bytes
SHA-256: 5d0bc7c200d66f789e2270c823c073a0616a0f55712c246e3f9a2418b03d0fc9
font_01_sfnt_off0000f5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D6 11188 bytes
SHA-256: e76096132fe44bda3e98d8640a18d82c85674a63602e0349d4dae5648386d5e1