Malicious PDF — malware analysis report

Static analysis result for SHA-256 5042c2d019ca75af…

MALICIOUS

PDF

72.7 KB Created: 2021-02-23 21:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6f5772a15615d263b1d6ce12f68a692e SHA-1: 691db408f26510f5f796a86e3f8231a0ef3309d8 SHA-256: 5042c2d019ca75afee1788fd7e0e7a398bbf9c4ad80b431298408fc263194626
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=reflection+refraction+transmission+and+absorption+of+light+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380681/normal_602620821643c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485705/normal_60092cbb6b80b.pdfIn PDF document text
    • http://desekikimok.22web.org/rukiwukurifuweza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365659/normal_5ffa0587976bf.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/pubopelej/93026269086.pdfIn PDF document text
    • http://gibivugaxuma.rf.gd/londonderry_air_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/writing_empirical_research_reports.pdfIn PDF document text
    • http://fofepiroxazu.epizy.com/zowiregolinomuzozejumek.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/pixels_beauty_camera_2019.pdfIn PDF document text
    • http://jonemif.epizy.com/retro_game_center_emulator_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/68313184712.pdfIn PDF document text
    • http://gunuguduwurenog.epizy.com/23808502624.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/buberoxiniwumanogutiwana.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/android_10_for_samsung_note_9.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/software_installation_manual_template.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/primavera_p6_software_free_download_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/76037080320.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_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 5872 bytes
SHA-256: 85f48abcc8edf6ec48c39b954cc1563ec49672bb10620b3d33d4b32d872bfa70
font_01_sfnt_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 10000 bytes
SHA-256: 283f42b327f3f404375a4ecc3a3a03b6c9517f9f41e2a57c3fd232468a3d626a

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