Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e322c0af998826b…

MALICIOUS

PDF

89.8 KB Created: 2021-06-29 14:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 9095eb9dd6210bb00c8781fee3644359 SHA-1: 0147d1b18bf2833e12e2efe38b39128b1cbdd61b SHA-256: 9e322c0af998826bf68ba9925b62fc59bdeb1218e75183afa9ab4ac71c6922ae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/c050725df2c5a7bdba3b259bca112468/gumuzujenakeluwivezeku.pdf In PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/07732ab6777dc1d761704509c6870e2a/86832279929.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a8f9ac478---lelid.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/59573715435.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/41b57da423d5f1d569791ddd01244c63/68232242945.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/xedotidigonutoja.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/11077492503.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/gilafumatupafakap.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/parudef.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760d3b2f206---lugigaka.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/7ce8c84356a6b583b2937d112add4567/novaxekovezunilegeruroze.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/5067559189.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/3fd933007c0d44515622024ae7a6328f/13290934406.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16071a1e62f454---sixux.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/banujule.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/12388335481.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/41418280059.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/57227889431.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/49518549001.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/4e1d69f3d34e53e1b49f2ae5176ada28/9971503523.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/lapufovijekuvi.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/3c7c209fa59d206cd28d47360fc13d93/nemez.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/c2edbe1c5c48c7baec36bdbe8856aa5a/6334935220.pdfIn PDF document text
    • http://sixtyguildersresearch.com/admin/photos/file/92323810239.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=history+class+9+chapter+4+question+answerPDF 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_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 11152 bytes
SHA-256: d833ca41d97190cd46914db146ff3e5c620a2ee3d7935f1854f0bd0058b64c65
font_01_sfnt_off00011444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11444 17288 bytes
SHA-256: 7f4c9d682ac618e6694edba01f6559195fa8b4b602cc15d9c22e057dbb9dcd52
font_02_sfnt_off0001418a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1