Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0666d3b52ff6bf2…

MALICIOUS

PDF

88.3 KB Created: 2021-06-24 21:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7835ef1713b40934c2f1fac972fdb772 SHA-1: 8364bc377b32954f668499abdd1546e60d1a0f3b SHA-256: e0666d3b52ff6bf2a263529f16caff26e3aedcd1df780a10b76511828f6deafe
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The document's content and the presence of these links suggest a phishing or malware distribution attempt, likely using a lure related to hacking Wi-Fi passwords. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://drafthe.ru/uplcv?utm_term=how+to+hack+wifi+password+step+by+step+pdf PDF link annotation
    • https://jamuiboe.com/webroot/upload_media/24171459609.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b9fb84888---biperuwamakasosof.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/n0s3b5s0cmhhltv1jeedks6nd6/vazebuna.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609778322c8af---92573457198.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bdc00144a---92397492490.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/tipenusemo.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad39e2f2313---17334219137.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2259f33dd---93272010488.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5527754bea---52888164624.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/28268873428.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/bajekozon.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/5510cfae7191607a83245ae30c56c937/vebebajugogul.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094855996ca4---29498866989.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/34166466871.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/towipusuxe.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/jejosesozipuwuwopi.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/27691332733.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • 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_off00010322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10322 5572 bytes
SHA-256: 9e6978b231768b2862043da74e157181e452f4584b8f60de58176b300cf0b050
font_01_sfnt_off00011621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11621 11148 bytes
SHA-256: 7bb0f6a3d905378a85f56170385a8ab66dcf158d4d3611e3596c7b7188cfc6cd
font_02_sfnt_off00013c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C3B 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501