Malicious PDF — malware analysis report

Static analysis result for SHA-256 915c06880defe516…

MALICIOUS

PDF

74.4 KB Created: 2021-06-23 03:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 982e6c85225e3f8ebd3b78050887883f SHA-1: 05cb7baf3a36493b52c504837776ef873e0122b9 SHA-256: 915c06880defe516031ad281c7c61ab6c1954250aaf980366b567035b7ce4205
236 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF contains numerous links to potentially compromised websites, suggesting it's part of a link farm designed to distribute malware. The document's content and heuristics indicate it's a lure for password cracking and potentially executing commands via copy-pasting into a shell, a common tactic for downloading and executing second-stage payloads. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://betalinktech.com/blmedia/file/kibijiwozefawovowizeku.pdf In PDF document text
    • http://hoinhikhoavn.com/img/files/76288354808.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8634537f9---49667118216.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/19654274585.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/88fb7efca97e82062bab142bb211b0c2/diruvibodeke.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/jubage.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5cd10846f---vukasazazadadupepimipeder.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/311749512.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/05lc5trvgqa3e8ql8259ep6baj/68967228567.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/binafusesarot.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/b683d0015479dca7e82cc491d4e1c87a/tixudexedebepezokadujusa.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/fonowavat.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0dcfe75a8---14716143128.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/zivurivinibukofib.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/0b35661ec6f0b792741ebfa2c32322e7/firomogov.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/40198046165.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/4a000e1fa63f27ec6063c1675daf8da8/vusivubawuze.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/ximulidajibopazi.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/3a1580fc2c3ce76c5a10bd2f0da9be30/jimegekapopex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+crack+pdf+file+password+free+onlinePDF 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE407 5268 bytes
SHA-256: 7251ba4f38338db5214e5f0cd47dcaf4327176b0195b617be6cae2d9574e04d8
font_01_sfnt_off0000f614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF614 11856 bytes
SHA-256: 95b75ceba25c9b7e41c571de96725c21dc59695769dd7c4b710590d1913c128a

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