Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff02faab20f92bf…

MALICIOUS

PDF

71.0 KB Created: 2021-02-24 20:58:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5bac04bc1ba7d15cacf252724c638977 SHA-1: accee1e9f3caa6d4683fcf10863ee8a86e0aee5d SHA-256: eff02faab20f92bf865b420cd4e0cb483d4aa38c80b66a9f24f9e3bd5b3563d7
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://jottigo.ru/wb?keyword=ps%20vita%20firmware%203.60%20release%20date PDF link annotation
    • http://fallofelin.online/domojaddaf6.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/nifadikufukuregosotog.pdfIn PDF document text
    • https://lemarowaverixax.weebly.com/uploads/1/3/4/3/134371099/gowixukuretogisus.pdfIn PDF document text
    • http://helplnstagram-confirm.com/worksheets_on_active_and_passive_voice_for_grade_7hs9pe.pdfIn PDF document text
    • http://adv-workshop.site/sql_server_administration_tutorial10awg.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/bejunopavem-wumumi-vuzakanuk.pdfIn PDF document text
    • http://afracheat6.xyz/subepivopefomixeri8wacp.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/how_to_say_thank_you_for_comments_on_facebook.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/tejuvonixag/how_does_a_septic_leach_field_work.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/welding_workshop_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/3665989917.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/amoeba_sisters_enzymes_recap_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/sakuvapi.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/vosofamutorokaxedaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/51301161552.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_off0000d71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71E 5696 bytes
SHA-256: ef94c9c6ca6f5ad00d7f0cebaf57a79e9ea1c80a7f0c39ef5e9b694e737c08ad
font_01_sfnt_off0000ea87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA87 10804 bytes
SHA-256: 5c7f1de4f4111fdb6f2d99050293a34eceb834566ffc5afb95e0748d6c103e9c