Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75026e5be141f1a…

MALICIOUS

PDF

90.8 KB Created: 2021-09-24 02:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4aa5d9deffc3ce2ac8a2508f912a54ac SHA-1: b7dbd796a7153b42774f537085fb2c1d8bb6b8ca SHA-256: e75026e5be141f1aad8833dc20ac663892651fce0a0acbd1c83f326756cd29f7
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to various domains, some of which appear to be compromised WordPress sites. A critical heuristic indicates a 'Clipboard command execution lure,' suggesting the document instructs users to copy and paste commands into a shell, a common technique for downloading and executing further malicious content. No scripts were extracted, but the presence of embedded URLs and the lure heuristic strongly indicate a downloader or initial access mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krisoc.ru/uplcv?utm_term=castlevania+symphony+of+the+night+sega+saturn+rom PDF link annotation
    • http://mzch.pl/userfiles/file/83150432161.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/12131848020.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c50c2cf9d---24175218942.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210902001215.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/sinavofapifapuwitowag.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/ninokefubij.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/28527889732.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409e3b3512d---97143025388.pdfIn PDF document text
    • https://asi-filter.pl/files/file/kedizupes.pdfIn PDF document text
    • http://nemochem.cn/upload/files/mefojilurokivunanunugoku.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/71127099569.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/depozap.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/14481677635.pdfPDF link annotation
    • http://yuh-tarng.com/userfiles/file/81120131879.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614129c814c05---pagozoge.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/51021371170.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/22031145666.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/69925785482.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613f76641f00f---72314191040.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/zexitogode.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/210901111614038047cesc0.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/leriwaripimun.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/39270122934.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/k95i4u0hvabopm64t0hqqlgrj0/paxeru.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_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 11116 bytes
SHA-256: 8a7aed354e8e54e35267d1b6d5320dfb04562a55d13b3cadc248705f29a9bb5f
font_01_sfnt_off00010c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C39 21044 bytes
SHA-256: 7bd927994711dbcef773bac7497eccf70e0b6f35f76ba1f9dbe13ae69ef6e9f9
font_02_sfnt_off0001433f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1433F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.