Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d200878226c9c2…

MALICIOUS

PDF

81.5 KB Created: 2021-09-21 13:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1dafe9c665fa2d70163bdee3427cb691 SHA-1: 2ff59b1ed3ab6a4b29c71ba58742b64df1776c76 SHA-256: 86d200878226c9c2568de01eef7a7b7bb5eb503deebe6378ce9400e3b0a39aa9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing lure or a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://infrive.ru/uplcv?utm_term=ispoofer+ios+13 PDF link annotation
    • https://projektovanje.info/userfiles/file/giradipowujaxo.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/kuboxoxolotuxuzakaxe.pdfIn PDF document text
    • http://trevorhannant.com/97916371033.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/botivo.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/55481247184.pdfIn PDF document text
    • http://pactolous.hu/upload/file/tanamuwipuwakepatog.pdfIn PDF document text
    • http://cityfate.com/files/files/wazopubanidafugulewovujo.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/bofedebanini.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/bolibejosuxajojuxemefe.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/medasifumejogeva.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/velobimupubixus.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/dikuvutuvuponinajobe.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403cc6e07d0---68942540952.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/zunojovisokemazad.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/37402488624.pdfIn PDF document text
    • http://maybaobidinhdinh.com/upload/files/xasevisizogidufaw.pdfIn PDF document text
    • http://harrodsrentacar.com/public_html/userfiles/file/rabametenogo.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/fevufepedomuvexazajegara.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/64421975469.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/63534702959.pdfIn PDF document text
    • http://nikolabartakova.cz/files/file/75252574479.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/gulinaxiresonevorawaxa.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_off0000d918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD918 10116 bytes
SHA-256: da483fd662b182ad308477aa3e38b3a546aa06697323ffa84beb3f7d4bedf1bd
font_01_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 18868 bytes
SHA-256: c0991e09233390f0f6cfcece448395a5f72a1c4f06381a3252ecc7289a7cd9de
font_02_sfnt_off00012091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12091 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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