Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f1ca7abca96e1d…

MALICIOUS

PDF

55.6 KB Created: 2021-06-22 13:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5248ad0904d08137b5977fbf8f288aed SHA-1: ca9f61887e550a4cce96a94dd7b69bc1072d55dc SHA-256: b8f1ca7abca96e1d5cf728ed5fc87355ce45fabf43fc397f71bd1a5ef0c36289
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content or potentially exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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
  • 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.
  • 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 https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160797aabe4a16---84550751301.pdf In PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/bawivesevovenas.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085e77964706---16341959650.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607d689563b64---37287673280.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/goxisiberawuliwa.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/thtnve5lt7fe2q6er4lqr0iec3/65010080375.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/3nk00gn73it3t0f2ihvud2tvs3/dulojug.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/83619520053.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609aba3f5d1e8---bemumizizutaledoru.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/wawawizizatosew.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/22ef3f7e0192a254e4221345dd8459fa/80492594425.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202106/file/88372216146.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/u9fhaer8k52ovs781v6g2qms8d/tejinenifeduwudakawe.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/80625853437.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd216a6389---41652930478.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/7a92cc1de70269066836772b3511a060/18439368772.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=sakhi+film+songsPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF01 5252 bytes
SHA-256: fef5f6857686bba7a89e4991b7679d0799a9f4bc500c20bce0a161171214cd47

Open this report in the interactive analyzer, or submit your own file for analysis.