Malicious PDF — malware analysis report

Static analysis result for SHA-256 b13eb37364730785…

MALICIOUS

PDF

71.1 KB Created: 2021-02-12 19:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b0b5a12bb64a23118972c2e2ca77ca7f SHA-1: 81b1952e9732af015af4c2c09f913716d92c08d8 SHA-256: b13eb373647307855a392cf2780aa291a414a8b8c8a1299d68db2cdeb4524f39
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=pearson%20algebra%201%20workbook%20answers%20pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4477162/normal_600290791476c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_6023e990d2f95.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/govemefetomodedetodiopenn.pdfIn PDF document text
    • http://1offpark.xyz/uefa_champions_league_draw_bleacher_reportukwrq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_5fdaaa578396e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491450/normal_5fe1bf6b0d121.pdfIn PDF document text
    • http://xtina.online/wogamoxezexovokodijek0k86d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5fe7de3693b8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_5fd99fd8405c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486221/normal_5febdec17c517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417226/normal_5fdfb6e3b692b.pdfIn PDF document text
    • http://oneplusonemain.xyz/exercises_for_the_feynman_lectures_on_physics_free_downloadahgk9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tujolelulovowew.rf.gd/hd_wallpaper_for_android_phone_5_inch.pdfIn PDF document text
    • http://xenivut.epizy.com/luxexeraz.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/42792447061.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_off0000da52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA52 5560 bytes
SHA-256: 40031e92989e1f137c392314acf1c22ce8b2660b6abb34a14ca4b00e08fc193e
font_01_sfnt_off0000ed5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5A 9968 bytes
SHA-256: 49d2abae4e5d71485a6d2ed97b35ba57d009a16d8eff3a5794a1dfbdf9b9be88