Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec7e3138a3292db…

MALICIOUS

PDF

79.9 KB Created: 2021-04-19 22:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ff22f7b6b0d68b9ca71abc46f2064a4a SHA-1: 57b10659af4644c1ca823f73a5b34ec9b826e498 SHA-256: eec7e3138a3292db48d201fafd69f2e12c9e88853880fbd668d55a8201420337
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://midufefew.ru/strik?utm_term=4+elements+of+hip+hop+wallpaper PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446489/normal_606ea8e9f2553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_6054bc0635b84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_605c4ed6d0a24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468270/normal_603bbe78351cb.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/4kUaqTF/kirexadexoxevidosisokeper.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/gjxjcNQ/tazefesudinegagugab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_6041fdc0ac686.pdfIn PDF document text
    • https://cdn.sqhk.co/josozudibud/jbtjhha/67360034082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_6066eb22137ec.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/N6fifge/highway_zombie_hunter_apocalypse_shooting_games_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416654/normal_6005c5725d005.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwojosop/Hfvggcf/doxuliwutapubuvum.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/kizugokofo/tri_hexaflexagon_template.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_13020fec95aa4186b4234862eaf9b746.pdf?index=trueIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_0077b65a0bff4013ac235780388dd488.pdf?index=trueIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_57e758cbee054077a65648c805c0f975.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wunojipu/mifizara.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/4405618618.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/bulimezefokuta.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/68383746745.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/zupubipamovifamigodone.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/86631873167.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/fipebedudafo.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/what_is_the_concept_of_career_development.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/pewafozobedemasixevi.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_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 5224 bytes
SHA-256: a2ef1c1d919e6a544589fad5d2cac0cb71e830afcf5f71715ca341550470f998
font_01_sfnt_off00010c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C35 11132 bytes
SHA-256: 87aa7b123cf1296a9d11f1a69b0310635587992c8d95ca4b060d4bcba8daf69e

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