Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f785659153faf5…

MALICIOUS

PDF

63.7 KB Created: 2021-09-17 07:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: eabc84975c80a773336b44aa5e1db9b5 SHA-1: d230a82879ee119779f626efa4147dadf4f42b94 SHA-256: d2f785659153faf5b0c3bd6f7b499a0d166eacf1685719487ea1776df23b1477
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5661

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 http://thietbibepnhahang.net/media/files/9132018597.pdf In PDF document text
    • http://vkp.ru/upload/global/file/74293747582.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/82210958309.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/subofulavunafusulokino.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/93222399734.pdfIn PDF document text
    • https://vantainoidia.vn/ci/userfiles/files/tuzisazit.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/kevojirirulorasodibeji.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/66799471788.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/roxovarejinenomifirovat.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161393a5865e65---dakosarewejulamudabujaret.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/xuligexumi.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/nowuxijagemume.pdfIn PDF document text
    • http://pasted-radio.de/web/files/29911352026.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/sofisotizonu.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/85635371380.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/97581855054.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140d7ccf1bc2---vamamuperefupikusuvelub.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b85516e83ffaba3bc408b0024d19a05c/juwiwogepatudutufavuno.pdfIn PDF document text
    • https://ptogel2.com/contents/files/logemowuwemebapeliwe.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/18050121634.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/jovepuzobijuduwunow.pdfIn PDF document text
    • http://old.arcnet.org.tw/ckfinder/userfiles/files/pedimutovulizome.pdfIn PDF document text
    • https://icbacademy.com/upload/files/89471761047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=a+minute%27s+silence+2016+full+movie+onlinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E4 10880 bytes
SHA-256: 96732d2be5317a1f2137ffd1dbb73af0df0d28b4dcfcd746950bae5f254399fa

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