Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d938f126caf851…

MALICIOUS

PDF

75.6 KB Created: 2021-02-09 17:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 3a840640323721b28a6815fefa22cb63 SHA-1: bdc0c995b74d0ea9453a29c277b838ea67eabf99 SHA-256: 16d938f126caf851c4600d3620212b99574ceb85a1c66e02a2dfb1fe3ee4c313
136 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
  • 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://jacksth.ru/aws?utm_term=certificate+of+attendance+template+erasmus PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412568/normal_5ff8135cc3d04.pdfIn PDF document text
    • http://bristol-yalta.run/wetikeferopoxonapopogisia28w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_601e74cbb12e0.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/knights_of_labor_definition_apushsiaju.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/ziegigc/26435781029.pdfIn PDF document text
    • http://findssldz.xyz/libibosowofikewajexewumn38v.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/22344371858ntb45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382780/normal_60026c7e093dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bimumebuzof.epizy.com/10359995060.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/how_old_are_you_answer_key.pdfIn PDF document text
    • http://titarugusarab.epizy.com/foxamexegerefeginusumita.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/18389279091.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/blue_jeans_software.pdfIn PDF document text
    • http://favigagiwu.epizy.com/passport_renewal_form_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/manual_da_execuo_araken_de_assis.pdfIn PDF document text
    • http://nononowixumutu.rf.gd/50218695710.pdfIn PDF document text
    • http://furosusuz.epizy.com/free_calling_app_for_android_without_credits.pdfIn PDF document text
    • http://molodetagako.epizy.com/46795605330.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_off0000eb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 5208 bytes
SHA-256: 01602f4610cab6b96fcaf407397140590db071daa3a84a9fca0686cfceb6a0dc
font_01_sfnt_off0000fcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 11060 bytes
SHA-256: 18be43692102a1a38d4637eaae4aa89d549262196141a460d5c17957cb58683b