Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40deda0e0648b1b…

MALICIOUS

PDF

85.9 KB Created: 2021-07-30 09:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f646935b1d2db66c96d7f999c238a060 SHA-1: 2b81c2cde4cee27771a62ab8b8dcecfe1d91726c SHA-256: b40deda0e0648b1bd300329664fb87ffc5c80460ca467625dcf7f93dfdcb64a2
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised upload links and SEO-optimized disposable domains points towards an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607868308e0b1---19316219644.pdf In PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ada9447608---64401126717.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a41879effa---bukuvizugaranejinozuw.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/9da4a4ab788b5c0da0c49a775e114be2/jagewidefawidad.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096a5695c349---14765597218.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/24590817593.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/82eb0f7509ab5993538e929f23aca78e/84261419707.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/jb5n5fdmm9ggdfs6tjhvqv5v8f/25701945136.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/liwidemud.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210714075947_ly6s3w.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/67266062612.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/faruwokinewatifani.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a20ddfc18---98005154550.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/ad95c63d10ca259c564cd0b793319a2c/49824594808.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/gekorowonofav.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/shfji3gesr4gdjcjh2pjnli6e3/10652412855.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/satibewumanu.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/a2c858840450e186a6afc278bd5752b7/lojukigumuximemu.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/he0v0k5053v0ah25todpt4lbl4/mokilewewilox.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e0ae21c1---zukakoliduxik.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/6bf552d0dd3d9c88ac9818ae03864962/jatoxeta.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/wunevuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=funcion+cubica+ejercicios+resueltos+con+grafica+y+tabla+de+valoresPDF 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_off0000e492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE492 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA9 11176 bytes
SHA-256: 6ee2e183cd1752390147837a15c58245e34ebbade8b8e46138a509e267b7f4bb
font_02_sfnt_off000116b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B8 19208 bytes
SHA-256: 686507fd0b4119e13f86748cc0d6ca625540036e95eb0af4432aca98f3a625c9

Open this report in the interactive analyzer, or submit your own file for analysis.