Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46945ee8fe4676a…

MALICIOUS

PDF

85.5 KB Created: 2021-07-20 04:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 33bafb082ea3e12ed3d27b4044a6e5b6 SHA-1: cb6a81adea956eba3797376d3528101b6ed33599 SHA-256: e46945ee8fe4676a42b2735089b7f3206edd1a27626e7e05d271767c02893f4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing or malware distribution sites. No scripts were extracted, and the document body was unreadable, but the link farm behavior is clear.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://stolocatering.ca/clients/874514/File/88036902269.pdf In PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db61b8694b9---8895949103.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/sumeguruja.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a0050551603064e106eb0b9b0d114021/89425464546.pdfIn PDF document text
    • http://gospelinamerica.com/clients/874377/File/juloneterimumokozib.pdfIn PDF document text
    • http://firegallery.ru/img/upload/pijeziz.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/kakebeluvoz.pdfIn PDF document text
    • http://willismctyeire.com/clients/c/cd/cd1fd5262213d36872a77bd42df049b7/File/novexazikifej.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/hs5nd1qke7fuj9e9i65q011g44/64822020247.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/77326977928.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/5qih0egck8tijlai03dq63s875/kegukixu.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/f3ef2d3c69c4ba2d84484678f146d77f/dilibuxit.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/8302280835.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/14317171205.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/57013050852.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b99eea2e159---goxuvipitunodan.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af5ea89022---85147951807.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/nesokoxuforetojuko.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/nudawiredipun.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/mebelrmi9hrhbck6vdhgk5ck41/79306986943.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/2298a46476ee5f30144be0911fe01c97/bugadanuloti.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/81145389336.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/8960482298.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/81837cc39738afe6817daa389cd3baef/linabaxusekufi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=stevie+young+ac+dcPDF 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_off0000e9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 10584 bytes
SHA-256: 4892012964c00a055e4cf9b4249a2c1801eb9aca4c4a8e24ef9379cb69039cc9
font_02_sfnt_off000119e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E3 17920 bytes
SHA-256: b349514b9d839f99cd7838b6119e748ad234dfb2e5430f7be478629357254adf