Malicious PDF — malware analysis report

Static analysis result for SHA-256 6039701ff9e9059e…

MALICIOUS

PDF

71.4 KB Created: 2021-05-03 01:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f3e95e3ff87e8b3897937b4132412d31 SHA-1: 526d3ceed784901b85e47e08d604c28322ec5983 SHA-256: 6039701ff9e9059ea62e7ef3fd856d9744b65ffe85ec8f8488cab9c04e28ad05
96 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 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 0.9996

Heuristics 4

  • 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://ponafet.ru/strik?utm_term=dance+like+song+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459482/normal_60535510197ce.pdfIn PDF document text
    • http://wexypay.icu/96013314563hj1a9.pdfIn PDF document text
    • http://wigomufeze.22web.org/medical_termination_of_pregnancy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_60122d01bd82a.pdfIn PDF document text
    • http://liolika-rsya.ru/23812563917twyl7.pdfIn PDF document text
    • https://cdn.sqhk.co/kakolutezegu/hidlZIG/bleach_brave_souls_android_game_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/ja4ZRig/como_hackear_warship_battle_con_game_guardian.pdfIn PDF document text
    • http://francobusiness.com/tepexalisamufaguboao8lf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_60583176e6fd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446174/normal_600502f23a9a8.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/kotodur/age_of_empires_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/south_africa_political_history.pdfIn PDF document text
    • http://zadaxuro.rf.gd/29960863334.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_8eab48132da84b9d84a5947f6796b094.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/fnma_guidelines_on_student_loan_payments.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/86364207586.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/80637104993.pdfIn PDF document text
    • https://1b4a35e6-4aef-4458-acaf-853c8ba53f66.filesusr.com/ugd/738632_ed9b7a99963b46179dcea63c868cbcbe.pdf?index=trueIn PDF document text
    • http://gobunapuvifug.epizy.com/language_learning_strategies_definition.pdfIn PDF document text
    • http://pesokijodaroxo.epizy.com/gegake.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/sapivojujulawonezivotele.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_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 5132 bytes
SHA-256: 4d9c65939ddd54ead90f8a60c7b28b171f7f5b80b7c2c60c2a7439e997de17b3
font_01_sfnt_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 10940 bytes
SHA-256: d77e003b9c4499fb1dafcb2fd90c81530773147750ba092605bdc83cfb07318c

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