Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed0546ec14035b1…

MALICIOUS

PDF

82.0 KB Created: 2021-09-12 04:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3f32f245f4dc8823cf3c6bb3c6970111 SHA-1: 14460ebc1d034ad695d848515e16c754abddb316 SHA-256: eed0546ec14035b15355618954383f8afc5cabffe6fb093a540a5433b9baa0c0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, containing numerous links to external websites, some of which are hosted on disposable domains. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://rrr71.ru/upload_picture/98233386667.pdf In PDF document text
    • http://ng-sons.com/userfiles/file/23451166097.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/94607712783.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/mobajobufa.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/92917187193.pdfIn PDF document text
    • https://mkontakt.com/dat/file/4118991190.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/10832536892.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16133abb56dda4---ponuvomuxek.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/49379031925.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/68774994252.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/mutofinebugufuvikenodiki.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/33784025096.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/5830527464.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/38255250696.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/5dbeae9617f1949c66f78b5e078bdae6/felozapogijexunifobexaken.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/lonovugalo.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/golutasivaka.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/47195299839.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/47106191422.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/52707446328.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/jituxiroponisotixi.pdfIn PDF document text
    • http://allycatering.com/userfiles/70234256558.pdfIn PDF document text
    • http://splogservice.ru/content/files/91776794982.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/90126426486.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/pexuwikive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=redmi+low+price+in+sri+lankaPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 17428 bytes
SHA-256: 43c50d80c86646ab0414b47d2cbbb3cb938eae07480d66bcfdae8c8be1272fb6
font_01_sfnt_off0001092c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12143 10800 bytes
SHA-256: 75d0b1d55ce080594f05ab8ba6cb4edfef65447b73446c99cdfd3f025ba2b1b4

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