Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7a1f21524c8aef…

MALICIOUS

PDF

87.0 KB Created: 2021-09-21 02:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5e47cc0b87d9cb1ffbec13f86af43aca SHA-1: b32f737a453cbea414f8132811f17dd15b6d68e1 SHA-256: fe7a1f21524c8aefe1f505db801d05e8a92ae1fac5ef722231e930ed71d6160f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 https://coretry.ru/uplcv?utm_term=mobile+legends+injector+2021 PDF link annotation
    • http://alphasigmaoverseas.com/userfiles/file/guwotujokikasopodope.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/81978853007.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/emss7j8i37vn8rv6p8hikhaet0/12027298927.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/19411090339.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/30120019325.pdfIn PDF document text
    • http://casaperugia.fr/userfiles/file/80764868446.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138bfcf3dc6c---wubojezosekat.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a000ca18d9---fagafu.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/18519921642.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/98750236027.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/65586090405.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/86129186134.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/senerulerejapuribomaruf.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/zetodomuwazula.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/vumipagakubilunij.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/61912589858.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613aba884ad07---fixewuket.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/49034451024.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109012200412016.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/95579926831.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/dosekiduxixikusavatinegik.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/tazadiwakolumatuweme.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/43293186061.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/427ca172fa1e1b2802ee47f402e4223a/18307503061.pdfIn PDF document text
    • http://pacemakerpressintl.com/uploads/assets/file/vivufivenu.pdfIn PDF document text
    • 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_off0000ed27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10539 18344 bytes
SHA-256: abf5f12ce7753e28332da03d7dfbaa808cd9f027e10ab44d9f055e91ae149d98
font_02_sfnt_off0001354b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1354B 10940 bytes
SHA-256: e4ccf73a88c5756f1219c7526c1bbdad5b5d25dcf3ff8d1749ebe233e2a1510e

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