Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a594b82ddba6a0…

MALICIOUS

PDF

79.5 KB Created: 2021-09-14 05:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0adc43ea5914e30ffb892b68607bffb8 SHA-1: b86fec4a6d73f4f3b26ff8e9bc05574c81e5945c SHA-256: d2a594b82ddba6a0cd5ae260f0f39dbf6466adf1733d819a064c0e5668ebf7cf
236 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier. Heuristics indicate it uses a clipboard command lure and password-protected archive lure, suggesting an attempt to bypass security controls and trick the user into executing a payload. The document also contains numerous links to potentially compromised websites, indicating a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/aq8a8bgn54i3t2dp9415rt1i4s/41071323705.pdf In PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/80481288262.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/kulawimarokojuxida.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/marivev.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/fonoxudagofidemotoxatuk.pdfIn PDF document text
    • http://faradbox.pl/files/file/fogefukove.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/pesakakonamekepuxufixibez.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/sixovuvakamu.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/12746511035.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/a805c198f7e12d3dee90281b9dfd0e1a/ziduralolup.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/4590515413.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/sipibiluvi.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/rusowiboziludede.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/motubajoximofovukabatow.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/68566298529.pdfIn PDF document text
    • http://warehousetraining.ie/images/binuzipibidefazobadoxov.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/konola.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/lizirovezefosokise.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/lixubisafatebesurilufo.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/23337397186.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/lk5n15h15ld4cd28443b68i8of/terewipalunafekafuzaj.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/85340656525.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/naxasibefuniluke.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210903032817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=android+studio+cacertsPDF 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_off0000ce6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6E 19308 bytes
SHA-256: 82867c6490d971beb6530302742dacd2d4bfe15cca9e47c174f2b612329319d2
font_01_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 10400 bytes
SHA-256: a45cb364853113d79d5f4637a8c8c2cef88a4497e1bcf43ff5b5b9d5c7531d75
font_02_sfnt_off00011838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11838 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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