Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b24752068fdad09…

MALICIOUS

PDF

80.2 KB Created: 2021-10-21 02:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 83dd8b1ae948120f1f5aeddd4e120379 SHA-1: 958e23249bd59fe72ce862faceb00b7e2429d14a SHA-256: 6b24752068fdad09b0beb8236550b699c7b1d2f2412848ab69ec08cadadc6e74
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML and ClamAV as malicious. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or credential harvesting attempt. The PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=the+speed+reading+bible+pdf PDF link annotation
    • https://webvitamin.vn/app/webroot/uploads/files/kalisepepenasakoxufa.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/nukojavapex.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/29089244278.pdfIn PDF document text
    • http://sbkf.org/files/files/vubafovokonosajadap.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/53349313418.pdfIn PDF document text
    • http://edeins.com/userfiles/file/wutugebofojodowaxufeza.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/66055190894.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/leror.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-10-5/20211005000123382420.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/5vmao478s4r9cn468edi768a24/maxuriwopipabekebizovikar.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/biwefomoxakutaxirutewi.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/59439186094.pdfIn PDF document text
    • http://jr.ac.th/ckfinder/userfiles/files/113561752.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/67269591818.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/mijobotune.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/muwuxatunawivenaxazenab.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/dodunutodowipixajafeno.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__6162A1AA0387D.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/gotoladisepuxabasukud.pdfIn PDF document text
    • http://symbolfoods.com/files/file///44656368034.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/kuvofom.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/neronob.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_off0000d7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 16856 bytes
SHA-256: 0a6a4206ef0406d801ac7808887eb4d36d121a13e0062fb7b24fd4bc41b52223
font_02_sfnt_off00011b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7A 10664 bytes
SHA-256: 9042ff6a97afab900052f5fc881cc722c44e0263444f8feb3678e2ce08516fcb

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