Malicious PDF — malware analysis report

Static analysis result for SHA-256 e555914e690f6431…

MALICIOUS

PDF

70.0 KB Created: 2021-02-10 02:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 540f64360daafa603ee7b644899c33f6 SHA-1: 0d4bdb7ba35a9746ed4ddd6ff40db52300fa0367 SHA-256: e555914e690f64314691b88e60d936191394726063ae1f074d6606b1314fa4f4
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=b.%20ed%20exam%20form%202018%20cg PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5ff120bc74f82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407756/normal_5fcb6f9bb41d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485446/normal_5fdebd73a233b.pdfIn PDF document text
    • https://cdn.sqhk.co/zewuxumaro/RKggYhh/call_of_duty_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_5fdc0fbf6913e.pdfIn PDF document text
    • http://optalpha.com/24059737639h8d2m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_601054e1a3c69.pdfIn PDF document text
    • https://cdn.sqhk.co/perajomipe/ihgjidM/dufaralituwur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413016/normal_5ffc14bc0b0e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_602198135070e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465701/normal_5fecec7d9e323.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465565/normal_5fe1b949ddc91.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/mokuwanibof/nutritional_information_nature_sweet_cherry_tomatoes.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/23575710370.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/demographic_information_on_applicants_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/nuwulopagezufirukojowu.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/delhi_university_ba_date_sheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/33083537867.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_off0000d1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DC 5800 bytes
SHA-256: 444e892e060e32241d962d8edaeca82fe63db8bacbc59b8ec724d50efd819460
font_01_sfnt_off0000e599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE599 11124 bytes
SHA-256: 60432b82a6355e9770b48b74d9ab9fa88a37fe22c5b6d388cd3436eef92d20ba

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