Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8916242388c416…

MALICIOUS

PDF

70.6 KB Created: 2021-03-01 02:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1d3a1e770a8075c9c4e30fd3d1cdac22 SHA-1: 471973accc20de70a87aea6e756c543b4e9bb5ee SHA-256: bb8916242388c416857c0493ca59a81c24604b56c83fe28d7c9d4990addfc1fe
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/award?keyword=how+to+insert+bibliography+in+word+mac+2016 In PDF document text
    • http://ygrash.website/what_is_the_nature_of_contemporary_visual_arts_in_the_philippines0zsha.pdfIn PDF document text
    • http://profaudit32.ru/aplicaciones_de_las_funciones_racionales_en_la_vida_cotidianaz0e3t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_602238bf70a39.pdfIn PDF document text
    • http://goodsun.space/premiere_pro_crackir6nr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404730/normal_6037d45148f06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480382/normal_5ffcac2f943d2.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/fowamazejokujofabe.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/sherlock_holmes_season_4_episode_3_english_subtitles_download.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/crhaJji/lebara_top_up_code_uk.pdfIn PDF document text
    • http://dajexori.mypressonline.com/los_5_lenguajes_del_amor_libro.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/tobobowu/5809717928.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/48700171517.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/american_airlines_gate_information_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/99180251479.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/xomovez.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_off0000d588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD588 6260 bytes
SHA-256: d94630da83bdfcae8c8811d625cb2557afc48c9839241db59af54289a921ec9b
font_01_sfnt_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 10036 bytes
SHA-256: d0cccf1efc0beda41629377d3ab66a92d266089765ab75ffc6fc62350ea1ee73