Malicious PDF — malware analysis report

Static analysis result for SHA-256 f677eb036b1472d2…

MALICIOUS

PDF

72.9 KB Created: 2021-02-15 01:26:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cec536fc0d8d6ae040e69e72969f48d6 SHA-1: 383867b2e9d6e97b2951d8302221ea6f82defc4a SHA-256: f677eb036b1472d2b6afc33d56224b0ed9926c8b4ac7a14c5063f5e7face1cda
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/123?utm_term=how+to+apply+tussy+cream+deodorant In PDF document text
    • https://cdn.sqhk.co/nebafori/jj8idji/movie_now_showing_cineplex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452862/normal_5ff14ab266ec9.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/chagggf/basic_electronic_components_free_download.pdfIn PDF document text
    • http://begemotiks.space/ejercicios_del_abecedario_en_inglesvebjv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_5fd67c2d3db54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458144/normal_60005bf1a3b7d.pdfIn PDF document text
    • http://itdiscounts.info/39329020374b71wc.pdfIn PDF document text
    • http://feelslike35.com/542006685133ej0y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454435/normal_60067813b42f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464702/normal_600d47a431562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407571/normal_60294a9c300d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_602898b16a6df.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/ehaCiek/76771757140.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/fisulefajow/42441524567.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/jawopibaxodovixa.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_off0000deb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 5376 bytes
SHA-256: 6e5e0bc2f8ffbb237aad34ff01a3f92268ebd7c0e00b1b4e7381b80001e522c2
font_01_sfnt_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 11012 bytes
SHA-256: 57cf25fe7306891031cfdf368870df136888ce7cb227e6fcb28f0562eddfca0e