Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7452f2943e9d39…

MALICIOUS

PDF

63.7 KB Created: 2021-09-23 15:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 27b7cfb85de52b32ea8b58e910f53197 SHA-1: 029f03db9cc15ccb7c1ec73f8615219857ad36b1 SHA-256: 7a7452f2943e9d39c141d38569469a0ddfffb3dba6476e174ad132986d71d63f
124 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to domains that appear to be part of a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5661

Heuristics 4

  • 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 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
  • 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 http://box8websites.com/ckfinder/userfiles/files/27544773036.pdf In PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/wuneledanezivedesepesebi.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/rokiv.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/kuruwoxanitexezeluk.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/76424951658.pdfIn PDF document text
    • https://nitdgp.ac.in/uploads/userfiles/files/zozanagidujimeluma.pdfIn PDF document text
    • https://linker.tw/files/34471634724.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/xuzizoxubakop.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/zunasujajalobefarome.pdfIn PDF document text
    • http://classtool.info/upload/files/gerizijupiresolijikezupi.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/52587878873.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/jitalonakoxunezo.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/91451800103.pdfIn PDF document text
    • http://bresky.cz/res/file/49774522643.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b7caa97363---18839947114.pdfIn PDF document text
    • https://wecareprogram.org/images/file/jodedovelemabux.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/84782856618.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/tixinejoluvix.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/kokoxu.pdfIn PDF document text
    • http://hairfibers24.com/upload/file/79164814874.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210905_6C7E9A0C4A08495F.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/39625852219.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/38825720995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=fancy+text+decoration+copy+and+pastePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F2 10656 bytes
SHA-256: 770490c6454d3685a638ca5028edd91d997bde9ff4960b4d5a46e987daa4a473

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