Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c4c1802efa1af0…

MALICIOUS

PDF

91.8 KB Created: 2021-05-24 00:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 73c0a9ad448a14dab6bcfdf480bdcaaf SHA-1: 704e1a5778284556f6a547548cabecc4683775b5 SHA-256: d3c4c1802efa1af0edcf77bf6baaa908b7e1efa46919ef18f5b8026f30e4c9fe
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 0.9990

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
  • 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://maypoin.ru/strik?utm_term=list+of+comparative+and+superlative+forms PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386829/normal_5fccb0d60c688.pdfIn PDF document text
    • https://jadozuvar.weebly.com/uploads/1/3/5/3/135312187/856770bc64a1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462379/normal_5fcd31852b416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_6049833f9616d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_5fdc47ca5725c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403679/normal_602c8a5a2352c.pdfIn PDF document text
    • https://rilirali.weebly.com/uploads/1/3/4/2/134235358/vozabadofig_letupirikajuv_tepiroli.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/zanalul.pdfIn PDF document text
    • https://xifugewelude.weebly.com/uploads/1/3/4/3/134353264/608628.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/gopuze/digital_marketing_course_in_delhi_government.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/arthdal_chronicles_ep_10.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/sowonekefirusone.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/nomotumito.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/subel.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/robabut.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/dyson_-_cinetic_big_ball_total_clean_bagless_upright_vacuum.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/lawop.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/google_local_guide_rewards_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/food_banner_design_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/social_network_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/58704351023.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/telugu_moral_stories_writer_names.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/cci_full_form_in_accenture.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EC 5304 bytes
SHA-256: 32b2cb61177a3fb46432386311f6a446c07c91de8b1fd276552c503662f793f6
font_01_sfnt_off000125ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EC 11268 bytes
SHA-256: 17eebaf1279a74e461cd00f27480adcc46f8cd6157c3d4810efcdff9f7f9e7e0
font_02_sfnt_off00014c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9A 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61

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