Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b51fe6a5c4afd3…

MALICIOUS

PDF

62.3 KB Created: 2021-02-20 20:25:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 81f2cbb356275a7d92aba13fe0dbd410 SHA-1: 35a48d4623fc1e92bbda30266ebc96ef608acb92 SHA-256: 66b51fe6a5c4afd3a79c10fdb14f8cbc1b47b5f44f4479b759ac479c86bcec9f
136 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/wb?keyword=what%20type%20of%20reaction%20is%20ch4+2o2--co2+2h2o+218%20kcal PDF link annotation
    • http://pestore.pro/background_color_android_studiotf9ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_601f842ecab11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5fe7714bdcad1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459162/normal_5fff6470d6087.pdfIn PDF document text
    • http://harmony-market.ru/myron_mixon_smoked_turkey_recipeb1xi0.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/Zjijeje/3253560988.pdfIn PDF document text
    • http://iclod.tech/guxadogipomosoz4sfk.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/tibSgcy/automated_traffic_bot_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zufosupiz/fShxDh3/best_beard_trimmer_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475716/normal_5fe2e3816267c.pdfIn PDF document text
    • http://batut.space/92349122895e2t81.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/voropa/commando_2_full_movie_mp4_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/can_you_take_realtor_classes_online.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/kodixopovakiwut.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/basic_piano_sheet_music_with_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/lions_injury_report_week_9.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/27205292273.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/20278922985.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/ikea_hemnes_bookshelf_manual.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_off0000b56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56D 5780 bytes
SHA-256: d6258d4509d8485c24fddf21d81e47a6ee5081a05afbc982f13022270178ae94
font_01_sfnt_off0000c947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC947 9528 bytes
SHA-256: 05ace3fc191fafc86a0205a766bb3f4b358d33922cabe1b238cd35f4069fff07