Malicious PDF — malware analysis report

Static analysis result for SHA-256 c023969925f657e6…

MALICIOUS

PDF

94.5 KB Created: 2021-08-05 20:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5eb98c713f0a1bef5c19acb70929949f SHA-1: 69c3fd1a3ae01512369d7c5d9e004d69bada09af SHA-256: c023969925f657e68b5d0b22ea9cfed818dbcf1abd0b646f12097fd7425c2383
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF itself appears to be a link farm, designed to redirect users to potentially malicious content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/b973df5ec3064f27bdf8413b5b2c6454/29498898308.pdf In PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f45f85cee---rosukepopiwimivex.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc9aa2c3f9---romuwijerad.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0676370390---7692523756.pdfIn PDF document text
    • http://nonbodepsg.com/uploads/files/29003601629.pdfIn PDF document text
    • https://luminex.pl/upload/file/jaginesejevenofekiwatuguf.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/35119f12aea89cb9628daa303dde783a/15165101410.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/26119409274.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b1aa6b75e---42759177849.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/54299452381.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/q7hhr4etgj7nk6g9uhmna3l0ep/89789688195.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/gufaxeloji.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b822d8889c---beser.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/26592076177.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb8a72fc7---luluf.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/tefaxivokiwoxidi.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078c95e9e97a---20336687531.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160dab00e83b18---22078892358.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/167ecad11e81dd026b440b624b0cc9b0/bufuvonewuxixexepuj.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/sokiselarefagis.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/fm83sb2mcipdipc10mcvk4o42s/85933695368.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/9a1f60f5a64e1dddcead34d88c0a6601/raposopotawojapisawovujan.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/wilinaz.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/p09rm5475e12117qghs4ihbdou/belesuxomazo.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a008bd9dc58---ninesibasabujuxutejuwo.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7709b49da---poxuxinupoxelemovode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=verbos+en+pasado+participio+regulares+e+irregulares+en+ingles+y+espa%C3%B1olPDF 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_off00010923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10923 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12135 17616 bytes
SHA-256: d0424623b7dcb8f47c6b3265e9807aebb47665c60bb186a730c062fbe800deb4
font_02_sfnt_off00014e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E51 11220 bytes
SHA-256: c584e47cc025b5e5016e4db27e022a2700efe1a9d04f447a8b53d40b0546bbdb

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