Malicious PDF — malware analysis report

Static analysis result for SHA-256 db88e5a6e1c6695f…

MALICIOUS

PDF

73.9 KB Created: 2021-09-16 04:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f4abccfd820aa524a8646f9842c780b SHA-1: 9415dfc2a40c4a509138d458ac679af05e65c1e6 SHA-256: db88e5a6e1c6695fdf3472547a020931288fccefa21f60ac166989bdaab06e49
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final destination or leverage legitimate-looking infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://adamlegal.com/userfiles/file/34386663274.pdf In PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/xufowodawepesetesa.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/nulogirasadarukimib.pdfIn PDF document text
    • http://nscenter.cn/upload/files/21055835231.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202109060824181323.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/rsk25pt69hlpl00umo4q4ijuh6/nobul.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613918ffcd904---dalabuviduwufasozadu.pdfIn PDF document text
    • https://pcetravel.com/files/file/nigufu.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/38494149196.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/berimitekupu.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/25154495176.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/damipijovefi.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/kerisi.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/11523636747.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109041301062379.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/zakimovepefajomebo.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/kulosi.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/vubipimamijabakamaxoset.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614295ccf1cd1---88043748187.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021090720030594.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef387dad15---90033754729.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b48bc092a0---83543861611.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/44839652098.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/47752788712.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/fowizigazivumawezu.pdfIn PDF document text
    • http://jawarakreasi.com/file/wipemaneboporobinerabob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=latest+hd+wallpapers+for+androidPDF 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_off0000bce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FB 10636 bytes
SHA-256: 07eae416250ffe7b7fbfc94783db21262d62551aeea4aaa32960fcb33da83871
font_02_sfnt_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 17256 bytes
SHA-256: d5edc9fb48a4a8537f26746ce216bd6bea8f73a0f06d59d38ade6d37cdf058f1

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