Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3bdae97bcde22e…

MALICIOUS

PDF

70.5 KB Created: 2021-02-09 04:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 319ec5276d693cff4afd8d46933e045c SHA-1: ede66312856304b35e826395c9d2486a2583fb41 SHA-256: 7b3bdae97bcde22eb74458326563a708dc0113319bb87ea961bea93d5b39cd96
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://baarspo.ru/wb?keyword=argumentative%20essay%20body%20paragraph%20format PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501634/normal_5ff6004d396c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_6005e95e5ce6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_600eecb47d651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_6021d30af0d59.pdfIn PDF document text
    • http://funuvumolifedaj.iblogger.org/dufuxoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470535/normal_600f14b9e66cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481275/normal_5fcae7e2e43d1.pdfIn PDF document text
    • http://petrol-v-pol-price.site/halloweentown_movie_traileruqccb.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/dovulavavo/vugesabogifeguliwizoz.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/ability_360_timesheet.pdfIn PDF document text
    • http://lebasadalo.epizy.com/zupuwevuso.pdfIn PDF document text
    • http://kegepedefaripi.epizy.com/rowakugi.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/86584170173.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/child_care_information_services_erie_pa.pdfIn PDF document text
    • http://zavinawotomuvef.epizy.com/ritivavugevelolaxumiliw.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_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 5716 bytes
SHA-256: 0abe0bba170ff46eab6f2a7dea57558526d37a3fcded682cb51d9ceb7ed58d87
font_01_sfnt_off0000eaf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF6 10000 bytes
SHA-256: 9a6d15aabad2b6878f235a3d3110b7cc6ea3a5cf90e1fdd57b1b3604f2a832f7