Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56f427c8aef86fd…

MALICIOUS

PDF

69.6 KB Created: 2021-02-22 14:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3f3212f80a52277341d4a0bf8c85e7c3 SHA-1: 9eff63d242f750cbc0dc913f28cf0796d97acbfd SHA-256: e56f427c8aef86fdbabc34442b44eaa70ca6ca056f109aa781e0607368e1dc12
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/aws?utm_term=public+forum+debate+flow+template+excel In PDF document text
    • https://cdn.sqhk.co/zupodejadofe/Mih1kif/dukesegorokomakizivez.pdfIn PDF document text
    • http://mewibapevuwado.22web.org/91620390331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_600b375511a12.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/iaLhjfD/red_rose_tea_figurines_value.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_60159eef61e8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5fd643dd87562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_6026948cb0c72.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/hjjeDKn/mixer_apps_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pidenali/gfgegeI/36362510929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_602caea7ca172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_600c18ee97154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_60174466d2655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_600ce4a16c4e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480397/normal_600f67028176e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485156/normal_5feb3957b4f27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497638/normal_6022003d78fb6.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/kesumasaka/pdf_to_word_format_free_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/15264908582.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_off0000d323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD323 5424 bytes
SHA-256: 24123ca969f2972eccc1c57a4651e37383c63f03129b4faad1f97ebe5edc4466
font_01_sfnt_off0000e58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58E 10516 bytes
SHA-256: b1a2c4e6999630824b20c64b3d4a43f83e2a77e4a719a2ab2a72d4681515f6a5

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