Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0eca9a31a83465…

MALICIOUS

PDF

81.2 KB Created: 2021-09-12 01:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 52994bab07921ba0d5bc9fac00006243 SHA-1: 2369dad442bfa64875c947b73d8e6ec6c23c3990 SHA-256: fe0eca9a31a83465f113500f048e6e655d6a902138db9e20cfd8b8eced6ebbf6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://allytemp.ru/uplcv?utm_term=sword+art+online+2+episode+2 PDF link annotation
    • http://thedewakohchang.com/image/upload/File/7594553535.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/88155003994.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/vajud.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/lafavazobavilu.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/tozixogosunakot.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/dibikeburufo.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/99216842318.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///76451448324.pdfIn PDF document text
    • http://soupworld.de/upload/file/64295489581.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/wazotaf.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/vusolozemijukekofaxos.pdfIn PDF document text
    • http://showdoimovel.com/files/files/taloganorinavirujopa.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/72473136247.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/foxazilozatiluveme.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/74355558928.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/luvigofilosoj.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/20949572968.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/0b10a4f724462c34aee6e03fb29d92b8/dusabutizavexowijuz.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/rewenadedefefumow.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309572189cf---waperegofinaxemut.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/xinabuk.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/91790909006.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/kijisidov.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_off0000d7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A7 10668 bytes
SHA-256: d00e6b299be7b6802e7cd664831bd440ef5a30c761eb2a9d7826bd31cd52dd0f
font_01_sfnt_off0000f043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF043 18024 bytes
SHA-256: 5ded0994994506823a05cea9309fadf9fdb6bfc605ac49d4cbf9fc4f0cea6b11
font_02_sfnt_off00011f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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