Malicious PDF — malware analysis report

Static analysis result for SHA-256 3969d0e193cf8293…

MALICIOUS

PDF

79.4 KB Created: 2021-05-17 06:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eaf7e05dd1891f86ab383984cb296bc4 SHA-1: 80c73e71a052c9433de0d9ebd229c248541bef74 SHA-256: 3969d0e193cf8293b1edc4937e094d07b0cc5b245e62c8925b40698668d11cf7
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 0.9996

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://jottigo.ru/strik?utm_term=can+you+build+houses+while+in+jail+monopoly PDF link annotation
    • https://rezodipegizosif.weebly.com/uploads/1/3/1/6/131606434/ff35474a1f13961.pdfIn PDF document text
    • https://tomutoremaduv.weebly.com/uploads/1/3/1/3/131398477/2061799.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/dorimotusoxevurorubadakes.pdfIn PDF document text
    • http://bobujopolodusol.mygamesonline.org/une_bonne_hygine_de_vie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477162/normal_60028ff677c5d.pdfIn PDF document text
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/9ece719.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/darisowu.pdfIn PDF document text
    • http://renosivegegev.iblogger.org/javascript_pocket_reference_4th_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417423/normal_5fd7d1dc90c2c.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/causes_of_ww2_worksheet.pdfIn PDF document text
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/lawofepozi.pdfIn PDF document text
    • http://wonizojaru.scienceontheweb.net/ahmet_altan_kitaplar.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/kulinisokakewi/johnson_electric_holdings_limited_annual_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/nipiketuzukogevu.pdfIn PDF document text
    • http://xolomen.epizy.com/kth_phd_thesis_template_latex.pdfIn PDF document text
    • http://ronojegev.rf.gd/nebanamojifapukavadugoru.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/94897934045.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/beer_brewing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/how_to_test_a_36_volt_golf_cart_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/dumitetujuvokoguvabow.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/alcohol_120_2._0_3.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/easy_math_worksheets_1st_grade.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_off0000f9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B8 5420 bytes
SHA-256: 80208b3d0ca9c890e52622a7ab89be6883700e096f1bcef22134729806940bb9
font_01_sfnt_off00010c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0C 10488 bytes
SHA-256: 316213004a896a61318190aa9a672ccf3bce11e637ddbba5f63b7da2b62c4424

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