Malicious PDF — malware analysis report

Static analysis result for SHA-256 44007ffce78fedc0…

MALICIOUS

PDF

75.2 KB Created: 2021-09-18 04:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bfb9fa7f6ae30a3a9d88514231853d06 SHA-1: 8d21f6564a489ad2907fc788fa1460a25bdda71f SHA-256: 44007ffce78fedc0b6bf9320e7248254d23e08ca9792af12b7f7b5cf0f382ed6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. Additionally, numerous external links were found, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://florissantdesign.nl/docs/Image/file/57025635058.pdf In PDF document text
    • http://rabotatver.ru/userfiles/admin/xigubowekasutupotazip.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/gizovukimesusoderusub.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16142e56c01fdf---90374279273.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/zadobesebezesitifujezaj.pdfIn PDF document text
    • http://contactfm.be/userfiles/files/rumuwetinamunowenegu.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/zuzalijifulotekumavixex.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/bumonaxozawuzewipivufode.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/29196383570.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/j48jvkp7utnafsik40c7onh5e3/42904918521.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/mixewajaduz.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/bemazapabob.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/kegovetagixabiwotawunef.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/a0f765ba67b2fee3a2db8bda8f0e529c/pogozaporaniv.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ff3cdce141989c1f0dd9a7fd0df6e3f6/1295052808.pdfIn PDF document text
    • http://innotack.com/userfiles/files/2418121057.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131308f5c937---15732820787.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/38760883143.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/b8c4c1fd6ffa26facb3cc9c8e0f63c15/39653340665.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/61206516443.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/54661035328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=d%26d+5e+pdf+character+sheetPDF link annotation
    • 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://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_off0000bea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA2 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
font_01_sfnt_off0000d143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD143 20632 bytes
SHA-256: 300112f06a6ceb5b9372209afdfcad395a12bf5c8be6b5668c7b63c6c0cfef0d
font_02_sfnt_off000107ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1