Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee84414ab9d1e3c9…

MALICIOUS

PDF

80.9 KB Created: 2021-09-06 23:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9f0193aea8e427d7e135c36031d4b787 SHA-1: 17f7404563787d4b4de71d394c89f5a2ab558514 SHA-256: ee84414ab9d1e3c9f119a93f81d8abf916d7e8232bca2ea362010907adc83a4b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for executing malicious code or initiating further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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
  • 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 https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/5i90fbbd3uk09fdskdqbko3usl/burewapu.pdf In PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/wimumisukaruvujajivokas.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/20906991320.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/sebovivo.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/8373261107.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/61474156793.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/serap.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/0469eb9074d6fcc35ac6e71d3118d8f9/wikixebawirikeniwipuko.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/getelijod.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/8d387d6cd60d2406f759096d98764fcb/6778508611.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/571718330.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/84e8b44e2bd971ac1d09f55dc3703e4e/88983600652.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/sexovewevika.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/e8e278cb27409216d563b9158382d409/91974847495.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b04e6f1926---21616693756.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/94000640711.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/89103595665.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cf03c3efa---gaxekobatuju.pdfIn PDF document text
    • http://abpaluso.com/upload/file/56898189886.pdfIn PDF document text
    • https://85097781.com/upload/files/dorodijufada.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be54ac859cb---74840778298.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/29736428335.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdf9a89d6e---68538127823.pdfIn PDF document text
    • https://luminex.pl/upload/file/4217287543.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/fevulunarufezude.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/c79ee3cb71f69681dcfc13f442b64c37/8146124550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=link%27s+awakening+walkthrough+pdf+downloadPDF 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_off0000d7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCD 11044 bytes
SHA-256: 5555c5c628abd0ed3f236400ac95a23eb0f30ae31b5b6ed1abf8560f932d8cfd
font_02_sfnt_off0001094e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094E 16904 bytes
SHA-256: f2d7e18287a9b150e75dba21b989ecd366ffe5ce5ceef15c9351cbb1faed7c1e