Malicious PDF — malware analysis report

Static analysis result for SHA-256 db40a701ad1e000a…

MALICIOUS

PDF

73.3 KB Created: 2021-09-06 21:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c2be934f5a65f5470c7785803afa0e8a SHA-1: 865171263a0b8b81b842e9df394a3ff336e07ca4 SHA-256: db40a701ad1e000a4616f5892abb252a55676b58910d8f31ebd96322bfb1a125
64 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to potentially compromised CMS upload directories or disposable hosting. The heuristic firings indicate this is a link farm designed to distribute other PDF files. No scripts were extracted from this sample, limiting the ability to determine a more specific attack pattern or family.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4729

Heuristics 4

  • 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 http://fructusartis.com/i/File/26285550531.pdf In PDF document text
    • http://ilkyoukais.com/Images/Media/files/wipabo.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/dubop.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/4a506182cdd39181295f2da6fb7ae9b9/88593555356.pdfIn PDF document text
    • https://soechi.id/userfiles/file/86594260561.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/4219784257.pdfIn PDF document text
    • http://pasted-radio.de/web/files/zozezuseneropapubejawo.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca5790bcab---bikuvaropanu.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/vikerevifodijovixul.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/kumavatiko.pdfIn PDF document text
    • http://nfc.soo.jp/file/89169828322.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/jufezawijigedaxeworisav.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/ef227638c02c2236d3185d011a4709a8/jixezobesesugigudagid.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/xazemitutefa.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/8eb3109f661bee46d32a5f63787c0552/93955800465.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7587bcdea---pumumovutomiw.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/zaxomodatufep.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/dea8bf7a9b40399d25352ddf52b20006/57616731158.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ngt5dkfc0cksknqv3oeq6ml74p/rekajufabewutuzusolikami.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/95211280192.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/jibokawototomune.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/20497114357.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f9bc0e372---60485689273.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160885d71977f2---sosexudur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=dyslexia+worksheets+ks3PDF link annotation

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