Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55368f4769016e6…

MALICIOUS

PDF

67.9 KB Created: 2021-02-18 03:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d7aabdf676073cf5b3b676bf4d535411 SHA-1: df5cee9fd4b318aa73c4b664c96c5ccf2438c7d4 SHA-256: a55368f4769016e696689e3262442e8e1ce348d144d5f1eccc518da9f575791f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=what%20is%20polar%20and%20non%20polar PDF link annotation
    • http://smallita.space/anggur_merah_29vay5.pdfIn PDF document text
    • http://ewop.space/acrylic_nails_ideas_simplebh4e3.pdfIn PDF document text
    • http://tenp-mail.xyz/wulifivolamewuzataa2cw3.pdfIn PDF document text
    • https://kekuxepepave.weebly.com/uploads/1/3/0/7/130739312/rutuzuxumudovixowab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_6010465ee7f08.pdfIn PDF document text
    • http://basiditdcf.space/canon_eos_600d_service_manualyw1yn.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/bomifabipi/html_admin_templates_free_responsive.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/jay_z_takeover_song.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/xevogakubojo.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/defuvepagaso.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/jupixebufirejalifenixomok.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/calculator_free_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/46197427621.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/1787097664.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/caples_lake_california_fishing_report.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_off0000cae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE1 5060 bytes
SHA-256: d59ff07e0d0ad296ed2b3e0e48cde587d70722bc021b092d21d687ebb0f93445
font_01_sfnt_off0000dc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1A 11456 bytes
SHA-256: 6990a32d54d78104c68bbc411c902b5e2b4938637237cefe7c56a86b8a6360dc