Malicious PDF — malware analysis report

Static analysis result for SHA-256 c86778d7d16e901f…

MALICIOUS

PDF

69.6 KB Created: 2021-02-10 00:08:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 99eb5e78fa0dd4e4b2e130df90c3da71 SHA-1: ecf7a6c0d318b647d02a71f90d6985400d2cc1fd SHA-256: c86778d7d16e901fc89156a3c1a0b9ddfae8770753ae80d0a2498d233a80d133
194 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
  • 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=ultimate%20spider%20man%20comics In PDF document text
    • http://markettop.pro/37306787053uk5z1.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/Jw8aphf/dgd_afterburner_tracklist.pdfIn PDF document text
    • http://tk-time.site/productos_notables_binomios_conjugadoszpbqz.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/Uheiigd/75768158188.pdfIn PDF document text
    • https://cdn.sqhk.co/giwibilawa/hcjjnhb/93681780137.pdfIn PDF document text
    • http://crubr.space/5738836334124gek.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/72280359053byu4x.pdfIn PDF document text
    • http://kushtanash.ru/bozemopimefokusuzotivavinbtg.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/jiguwuzobozobaz/96017059360.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/corporate_sales_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/apollo_munich_health_insurance_policy_details.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/full_information_about_india_map.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/baldur_s_gate_android_save_game_location.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/29925899496.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/kumodedojile.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_off0000d27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27A 5212 bytes
SHA-256: eeee1165820550cb6bd71dc2d8f714032562a38e86ed25d1cd757cde451302f2
font_01_sfnt_off0000e416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE416 11256 bytes
SHA-256: 0c8792cdc4919b2b64bbf16a1d715b5d0166278f20fe17eb78525bf36c229acc