Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e67dfc78c5ba9d…

MALICIOUS

PDF

76.3 KB Created: 2021-02-11 23:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4989a7886cce879d2481dff5814ac23c SHA-1: 024d5811823e87b36a324853d4a8e86a7fbe01a2 SHA-256: 31e67dfc78c5ba9d1931cb31ba13f28571e000d8577536de0f79c36938b54b20
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://yafferge.ru/123?utm_term=cabo+rico+38+pilothouse+sailboats In PDF document text
    • https://static.s123-cdn-static.com/uploads/4489414/normal_5fe0827d37cd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500692/normal_5fd096211ff12.pdfIn PDF document text
    • http://takafebuxoz.22web.org/order_girl_guide_cookies_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_5fde2373c4ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_5fd3da99a8788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_6013bcd9e543d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5ffdb52239aa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_60233c3c38f1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_601359a28b3ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titegerekarirov.rf.gd/58237599178.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/monopoly_game_board_template_vector.pdfIn PDF document text
    • http://pamokozamusakas.rf.gd/awlgrip_color_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/99154020304.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/36322826474.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/77319982093.pdfIn PDF document text
    • http://zapuvem.epizy.com/gajawaxewuremelefon.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/curriculum_vitae_template_word_for_teachers.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/suzuki_bandit_400_manual_free.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_off0000ea06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 5424 bytes
SHA-256: 565e9a5b396b31a84cfb2fd579f4ca66ff846d5265adb703f6d86d88c1bceca9
font_01_sfnt_off0000fc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5F 11648 bytes
SHA-256: a5381f7d6138f18c30e9a86c125dba81e06229660c0bfa1f0c15dc86fa7d04ad

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