Malicious PDF — malware analysis report

Static analysis result for SHA-256 f573278ea151b2b9…

MALICIOUS

PDF

62.3 KB Created: 2021-09-01 17:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4e331c8e8a2bafc3729ba467d1f05bbf SHA-1: e7b246efae5d4cff32413df8875698a4ecedd7d0 SHA-256: f573278ea151b2b9c4e9f5937bd3fc31a278ab90108732dc2fec37a50388c6c1
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8634

Heuristics 5

  • 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.
  • 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://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/5c9a3774995fb47cc705c2d63f892dc1/28968573355.pdf In PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/86110519385.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780d6134dda---tobovosotadik.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/kitilekojam.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/86980168381.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160f77320ebfa7---wanirabemugujefefowup.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f32cfac086---59456864942.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/46380460738.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/tapumiroretini.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/dowukalelutaranuritofadu.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/vanejorigizukepezuf.pdfIn PDF document text
    • http://aquatherm-graz.at/files/mivugijerel.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d20b00c9deb---25206765235.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7d2055f0e---xapalegakebutomakur.pdfIn PDF document text
    • http://thienthaopc.com/upload/FCK/file/34278006311.pdfIn PDF document text
    • https://atesolve.com/ckfinder/userfiles/files/dajipejisu.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e8ba89d07d7---rubifopovefaro.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e216730223---39904760564.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/91793383802.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b92669a761---12939366441.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/jusujewosufe.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/gogebufutidib.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/kisotimaxul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=the+theory+of+computationPDF 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_off0000bcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BF 16900 bytes
SHA-256: a679639355cea976bcf8906696eac02ace7f56f95a7c7f3adbece13859e3cca1

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