Malicious PDF — malware analysis report

Static analysis result for SHA-256 348402501071b972…

MALICIOUS

PDF

63.7 KB Created: 2021-07-18 19:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7984bd6edafb3bee0728dc0496cdf7c1 SHA-1: d8cb78a72184662904fb8e7bd72d2fb02c6709ad SHA-256: 348402501071b972722d26314aeeb386bb752e3b6f8c4072399a964c1150f6f2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, indicates a link farm designed to obscure the ultimate destination and potentially distribute malware or conduct phishing. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8794

Heuristics 6

  • 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.
  • 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
  • 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://lideparts.com/userfiles/file/1620480247.pdf In PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/20265437222.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/98953469646.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f897ff2a30---tivuz.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e55b4d04a12---butagi.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/timifewaxuxazugumifisazez.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/feb123bcc2743cb8a9d775e5b78579b7/lomakadilu.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a55ab94e802---69400319442.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/23826562330.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/bewumevanigupemirivo.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/24257621280.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b2c44f3d4---kidilotefud.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/3cef6b611428244bdde631321415afa7/vitukoxefenopus.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/bec3283ff85bc511fddbc21c3f405651/lowapasuvogut.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9661fd81e0---gisixomedidomole.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/vimerajor.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/5973779332.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/34153677379.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2fc8d949e---96341232955.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/9fe7c483a9c1f9793228c72c5e68a9d5/16082641378.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/dazekovarowaja.pdfIn PDF document text
    • https://starbox.fr/img/files/3930738722.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/da41748820088ef17ef3baa2e51d5c1e/55275296594.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/2293d2530018304542fe6be8fce31be0/kalezotejusigupuwojuj.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/23339566701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=you+are+beautiful+inside+and+out+in+spanishPDF 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_off0000c1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A5 16300 bytes
SHA-256: a52c632cb74baab86cc0070b5cd525313bae31b9dac533fb2124cad198ef0610
font_01_sfnt_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1