Malicious PDF — malware analysis report

Static analysis result for SHA-256 658bbc09ccbb8351…

MALICIOUS

PDF

71.0 KB Created: 2021-03-22 14:37:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0f805c44bc1762496a12f8c2df98cfd7 SHA-1: 3de5d774944549d469a79ff31f92b528c9c4d699 SHA-256: 658bbc09ccbb8351a15b659137fc76b3c0050c67364e02eb542b65e15fe8127e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/award?keyword=evidence+based+design+for+interior+designers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413375/normal_6014d7ebb0844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_600fab3c01198.pdfIn PDF document text
    • https://cdn.sqhk.co/nonodejudo/HggUi5F/gozuriwetewelepudo.pdfIn PDF document text
    • https://cdn.sqhk.co/vofepubot/lgihdAT/auto_views_instagram_free_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/jdJtrUf/bgn_launcher_premium_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503578/normal_60568825d3d33.pdfIn PDF document text
    • https://cdn.sqhk.co/pidenali/hgsifOt/old_man_s_journey_achievement_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/ijgdigv/diesel_trucks_mudding_videos.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/benward_music_theory_book.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/ghg9mXP/5801923966.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/zje6p1p/zazidilimusizojudotob.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/how_to_treat_adderall_withdrawal.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/rdk1Bhc/cadena_100_telefono_1000_euros.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462678/normal_601dfe9e128df.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/jejbhg4/26603050624.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fomepufasele.atwebpages.com/principles_of_management_project_class_12_on_big_bazaar.pdfIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_4f542d5d7dd8436486bc3f736747cfa8.pdf?index=trueIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_54ce10f3d72443e89c6ea22b886596aa.pdf?index=trueIn PDF document text
    • http://kofaxafogi.myartsonline.com/cacing_kremi.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_off0000d6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F7 5448 bytes
SHA-256: e7928c66fa274306be6296a43c7d7a7d23a5dda15e561ffe6219aeae2b294d19
font_01_sfnt_off0000e999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE999 10768 bytes
SHA-256: 287972cca34a46f9362f3217ea3c12cf85acc4c51a23ec07f8ea4d96931f548c

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