Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70b69f02f66df9e…

MALICIOUS

PDF

91.7 KB Created: 2021-06-30 09:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e76ce544b9cc1ed0b6b4c41fbcd35986 SHA-1: a9fa44fdf30bd5e81df347d30edf9f77adb353af SHA-256: e70b69f02f66df9e048e717792efb1545f6800ce0ce612cb7af4be9f2d1e325b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. While no scripts were explicitly extracted, the PDF structure and link farm heuristics indicate an attempt to lure users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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.
  • 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://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e14fd396a---lotubuvi.pdf In PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/bbaaa951e280decb374d39bb36cb19bb/94210056765.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd4f8f3c6f---54337588218.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086e05d10da9---74652110103.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/lepodada.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16071eb2a14eac---86714877379.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae01811f4f2---1662337574.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/15qrt46o8g8ameiabf0vivq71e/fopekipetunemoxofutakenax.pdfIn PDF document text
    • http://lokale-uzytkowe.pl/uploades/fckeditorfile/zutemaperu.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/39625723288.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7bdfaa710---4377842701.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/36532565279.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16091160a80cfa---41443600853.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e8003c9b1---dibaguvajodit.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/3cdfaff0c63880fc42cf4ad5d3fb1d85/24497304332.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/da7f78631eb9adcc1426888dd27deea5/jokapijafodalonelokem.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a97a3cdf3---58479975990.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa4f4b8f03---38025173618.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210611/file/regulikevebogati.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/sowireniluv.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/44047565150.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cd7c87474---bigiwesolozurowawag.pdfIn PDF document text
    • http://mcleod-bobbitt.com/clients/64742/File/sijomutuzazebeworediged.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160bcae8b2f8c0---dumuveredokos.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/abfae0151f741d0a9dff10c3a93bf77e/jugenotefugewujobepunu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b01d2ae107f---rewatav.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/be0575ed6a07d225e330767e276ff187/95355509419.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ten+cate%27s+oral+histology+9th+edition+pdf+free+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE506 17164 bytes
SHA-256: 24b375f3582d6b77a7c3e263a21ca92ac870375db07032c52c89f4c5bd3a6c70
font_01_sfnt_off0000fe5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001166c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166C 17632 bytes
SHA-256: a5725c10a0f66ea1fc71dfc9e704672a4af7499d0b3e8e2f004449b46938071e
font_03_sfnt_off00014403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14403 11264 bytes
SHA-256: 5a00b98365d1b1ad6b48930912a0b3d986406d318887668963ffb86627619048

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