Malicious PDF — malware analysis report

Static analysis result for SHA-256 575cbcf34d477220…

MALICIOUS

PDF

83.6 KB Created: 2021-09-08 02:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8c114107894fbf2d96eba7d72927b4fe SHA-1: 0d711feb9e4947492a34ea4c043817c5f557d9db SHA-256: 575cbcf34d4772209df0e36a9d3e2bc300605453a6650ab7bbf3713d3c049b82
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a malicious document, likely distributed via spearphishing. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of its harmful intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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://pixomot.ru/uplcv?utm_term=rice+production+problems+in+the+philippines+pdf PDF link annotation
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2661201d8---tavanunomapoxud.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/xajejipitolivovamafugomit.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160823ad794d99---bijelolezizubabugita.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/cbb66a03b6922135c6e72f41e912d612/turugawapug.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/30256320637.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/tozurerujuxikel.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075039bd7f88---15665796838.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/94372641626.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/zizeboluloja.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afab666ed9d---58356583693.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/rakevujume.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/edavmvfugmpnhkrkmeph30kpe3/31947857087.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0adf51232---fufufuguxux.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/54136021081.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/10918722714.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/68063061084.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e88cc7810cc---55109340565.pdfIn PDF document text
    • https://premiersuli.hu/files/files/61946478714.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/36eb44b3489b792e4b800d275e430f55/63640642173.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/oukgoepbavj4232hmqgp0nbts0/supakeni.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075a0f647e5d---bazufesof.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/lazejenakufitabepit.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d291f2086f---vuwunefozevulaxabawome.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875a6a67044---xoxatijofuzomadomur.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/juloxazoza.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_off0000dee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FB 18424 bytes
SHA-256: 8f7b2a6d5367ca60c4c2219f7b376875b5b7ac3a9d5232e7c8f193f11ef7e254
font_02_sfnt_off0001273d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273D 11008 bytes
SHA-256: 9a14a9fe6ee262fa260c30f939bde135815a08583a4c734f0e2a4374ddbdd368

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