Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c83e7e10609f98…

MALICIOUS

PDF

91.7 KB Created: 2021-09-18 06:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 762aed24beeb5f2f47f001b0acf263dc SHA-1: 1fac690b081be600f50afbc88558a149c4f52883 SHA-256: f0c83e7e10609f98493ae69137c7c2288fe53178920c3211e255e01f427a20ed
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of a 'download button' heuristic and numerous embedded links to external websites, many of which are hosted on disposable domains. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The ML classifier also flagged the PDF with high confidence. The document's structure suggests it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=the+binding+of+isaac+hacked+unblocked PDF link annotation
    • http://foodzipo.com/uploads/userfiles/files/rodozutekobarali.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161450ea01524f---88084082760.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/75006273302.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/88214579715.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/85815814a85b33b896b2ca15b0881b53/madidabilod.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/59422693473.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/8867496159.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/zafixabaz.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/21829092925.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/vipelirafizekugenomovu.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/wuradofekofikomeb.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/rubutujitijexaxawodusoxa.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/molijiremunatokuwofobubiw.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/80281119588.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/835940433.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/waziwowifonox.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/99801832876.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/sotetawete.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77056787809.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/wupudogaxoloxu.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_off0001004c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 10852 bytes
SHA-256: e2f7231945030d20564be6b380260f9f1cf0d96faf7c283426aaac52c5569411
font_01_sfnt_off0001190d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190D 18268 bytes
SHA-256: 14c2c303e01da3b9fa2ee35e409206fc5abbe822b5b8dd1eb9bc3f58f82f877e
font_02_sfnt_off00014939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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