Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2af79c23e7e5a9a…

MALICIOUS

PDF

70.6 KB Created: 2021-02-19 13:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4c59275c9f582b393ef031c4341b38c9 SHA-1: 377ea2684072cb14342f6ba2c98ad5b6e13c476d SHA-256: b2af79c23e7e5a9ac473f7f8522a931555e5b52a9be07607218e9d5b4f56ecc9
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://yafferge.ru/wix?keyword=science+fusion+grade+5+volume+1+pdf In PDF document text
    • http://bupro.asia/54484186436ekj3w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fd1e4fd51c6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_60238cdf49a8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411491/normal_5fefc965a8fe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_600d6ff781be7.pdfIn PDF document text
    • http://macsk.space/674115422351s588.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/likerajatob/intelligent_business_upper_intermediate_answer_key.pdfIn PDF document text
    • http://kujujigufa.epizy.com/95265713781.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/latug.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/98912763199.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/victory_kannada_movie_hd_video_songs.pdfIn PDF document text
    • http://tekaxebabix.epizy.com/13665470275.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/89861529298.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/blade_2_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/gizipatopexobeterunixu.pdfIn PDF document text
    • http://zazuxidavo.rf.gd/34137132078.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_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 5812 bytes
SHA-256: cbfdc28b32f8c6809082fafe7733cad9c0a336b84aed46ad94424efad580467e
font_01_sfnt_off0000ea0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0B 10396 bytes
SHA-256: 6fec2c54d2df2955eea2a28c56a5e11c4f4080b4f93afda7b00c924e2e8a1307