Malicious PDF — malware analysis report

Static analysis result for SHA-256 5834387e4c91eb98…

MALICIOUS

PDF

67.7 KB Created: 2021-02-26 05:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e5cd2b7d5b16e08eda02cad6bd137a06 SHA-1: 3d3301993f22b184f464a005506867f8b8e74d42 SHA-256: 5834387e4c91eb98b59b6b977ae5307167deed8036b529c00be1a017e0e7885f
136 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
  • 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.
  • 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://baarspo.ru/wix?keyword=thomas+jefferson+presidency+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372740/normal_5fed78efb149e.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/hp_psc_1315_cartridge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415740/normal_5fe269fa6911e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403807/normal_5ffd651f28a5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465015/normal_5fe604199057d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495526/normal_5fe4a9a206e24.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/gonabagofapegosukajo.pdfIn PDF document text
    • http://jivopifavu.22web.org/subordinate_clause_worksheet_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391326/normal_5fe4c670c70d9.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/goxapilenujelowunegoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/jaTmtie/9341181950.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/61739721119.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sutexuvidag.myartsonline.com/o_come_to_the_altar_sheet_music.pdfIn PDF document text
    • http://bibirosomuxir.epizy.com/windows_10_update_stopped_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/jesujebafelox.pdfIn PDF document text
    • http://fukasutatota.rf.gd/equifax_canada_consumer_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/candy_crush_saga_for_windows_phone.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_off0000cba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA6 5644 bytes
SHA-256: d36f3dec68b673b24e71a06af738bc97347093057bcac93969fba1b08406febc
font_01_sfnt_off0000dec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC8 10224 bytes
SHA-256: 80a391cd64e3049bc9bd318ef5ddfde6ed9e06122e81f4bad08fd0256f0ffdea