Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce0dad5ce6c0491…

MALICIOUS

PDF

72.9 KB Created: 2021-10-03 06:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e5a875d0ea7ee9a181d27f86c6f4130e SHA-1: e252cf0360017199486152053cd103e6c1624d1b SHA-256: fce0dad5ce6c0491f032de54d45d6450959583f7951e4440679ec9a8316d6ee1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs point to various PDF files hosted on potentially compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=engineering+economy+by+sta+maria+pdf PDF link annotation
    • http://akademibt.com/resimler/files/fobuzaxematas.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/161339480a208b---wekolefozumunizebar.pdfIn PDF document text
    • http://kocarbon.vn/luutru/files/97073878461.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/kufojaxaz.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161403807d111b---24113179760.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/dafomavevod.pdfIn PDF document text
    • http://jar-ted.pl/file/gebavutavedukadafexusi.pdfIn PDF document text
    • http://rotarytattoomachine.co/project-new/christianbook/upload_images/file/8617932246.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/fibisop.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/tazeninexufor.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/tozotep.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/govanamimukemumofavatasex.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/82341286357.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/mawamovijapufedi.pdfIn PDF document text
    • https://hgb.se/filer/file/pewapemuzijixelorimel.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/36881677474.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/wirinikawoxupiwowepanowe.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/55890174273.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/2226962065.pdfIn PDF document text
    • http://rrarental.org/upload/file/79514747537.pdfIn PDF document text
    • http://ropesadventure.com/d/files/wibabozisexaz.pdfIn PDF document text
    • https://advik.net/userfiles/file/26818013394.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/gowesonopaxegobalik.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/jorogamugojotatas.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_off0000b626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB626 18008 bytes
SHA-256: d95acb83b2978b98a392a01c8e9296aea030405c8c141a7fa95aa9a60807ef27
font_01_sfnt_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 11152 bytes
SHA-256: 64af70d32afdb0917cb544fab233d66e3bdbcbedd8e31dbea36633d8bff271b2
font_02_sfnt_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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