Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17810a5d023dc4b…

MALICIOUS

PDF

79.3 KB Created: 2021-01-20 15:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1c8617c2a687a8f9683549f429d129a3 SHA-1: bd24aace47c0bca8bb1ad00962e8ce1957a85d49 SHA-256: b17810a5d023dc4be8cd60872b4ae06a51e1d59cf14fa6f94bab25a05ced8ed1
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=dragon%20kingdom%20card%20game In PDF document text
    • https://static.s123-cdn-static.com/uploads/4379615/normal_5fe10557864da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_5fbd1eb9e0e33.pdfIn PDF document text
    • https://site-1195473.mozfiles.com/files/1195473/21153518573.pdfIn PDF document text
    • https://site-1174138.mozfiles.com/files/1174138/pasuzatijupexan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5fd9d7e978f53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5ff1864547cf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5fc746be89f50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501046/normal_5ff2e252a7a01.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/pegebunov/dollar_shave_club_august_2018_romp_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/larotopowadur.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/77383980025.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/21941739398.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/73015465078.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/adobe_acrobat_xi_standard_trial.pdfIn PDF document text
    • http://joxesovifelerav.epizy.com/wezoxonolema.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_off0000fb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2D 5112 bytes
SHA-256: e82e3520dab6680b56ddfeaeef3df6995cecddd0295aba1d77eb21d79b19d9c6
font_01_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 10664 bytes
SHA-256: d94038ba44c978ab16356d5c395af8c815e65dbdaa6de3105ee1a50ec6624ad1