Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1caf6df333cbd0e…

MALICIOUS

PDF

69.7 KB Created: 2021-02-15 03:30:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bcfc11809e67d07cfd36f50e82ad6e2b SHA-1: 35d18d5b83087a58a369abb469d5ae144f44cbb5 SHA-256: d1caf6df333cbd0ec193eeccea9960b7eb25be86474156289107bf52f50d0fdb
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://seumenha.ru/aws?utm_term=periodic+table+pdf+color+with+electron+configurations PDF link annotation
    • https://cdn.sqhk.co/varipivokil/aIic0YJ/11108122912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_602564ab5393a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470832/normal_5fe3e8a84988f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445118/normal_6015c07cea721.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378165/normal_6004dc3bc7932.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424997/normal_5ffaa2f448e90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464067/normal_6012343b2bea8.pdfIn PDF document text
    • https://cdn.sqhk.co/domonuxasi/Uichj0i/39565560148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_600cb94765a3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fc6aeaacd683.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/nitatotol/cie_a_level_business_examiner_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/limakibadexezu.pdfIn PDF document text
    • http://gizegojaza.rf.gd/five_paragraph_argumentative_essay_format.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/critical_kush_yield_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/hallowed_flame_endurance_guide.pdfIn PDF document text
    • http://vejaxekeni.epizy.com/45658631762.pdfIn PDF document text
    • http://timonuxe.rf.gd/xosovar.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/avatar_hd_movie_trailer.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_off0000d2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DE 5652 bytes
SHA-256: eaf23621cdcbe3e916393f1d70f9e9aa30fb0059ada3b703970003ed2e92f43e
font_01_sfnt_off0000e619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE619 10316 bytes
SHA-256: 614f5cc999000e5ea98d4da1ac5e23e7aecd77a7e0c6ba0ee1bb71f6876dac3d