Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1edc7f71d288682…

MALICIOUS

PDF

111.1 KB Created: 2021-09-07 02:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 86f759bf7723807fd7f7348be4b10299 SHA-1: 15b8050861ee999d7ff17fe8a7ccf8a7f472c121 SHA-256: c1edc7f71d2886820213541898c8dd3a3ed467d322f5c6b3467b6d659e722552
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/38238031730.pdf In PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/4dfb4c75848ee2053a326cf348222d2e/49182697891.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/fododekurevebazox.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160f9cfaca1e1a---88581029186.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ddbj9pesmefvgloere6lsjfcm3/sawozixonosixa.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/dinupemamilowakum.pdfIn PDF document text
    • http://dichvuhangngay.vn/uploads/image/files/diwotimumakizuwugesinati.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8f6bd4da3---kivifupowikorevefulito.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/9spjjst5tupireo9p0ui2hra1l/16289519553.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/ruwotuluvemeruzoxuvixop.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/noxologenon.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/3fa58e3bc0aca858ee842dbc169e9c20/mebojurokofoger.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/4qhhgautckr5pi6gfpgs7s5ac4/54218911521.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/348875815.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/rixefulelidoje.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebf9d852f2---dofabikimakazidozowazoze.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/50971846520.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/58845385930.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af925b1328b---36476395734.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fd42bbd70---dekanokibulawoxetefogew.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/79757554084.pdfIn PDF document text
    • https://tadimtursu.com/image/files/18739078187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=sql+cluster+manual+failoverPDF 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_off000148de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DE 10884 bytes
SHA-256: 2d4b5497ca1ee4cf2615c773ea398faf1e8c571a5603bda099b6a23c3762537c
font_01_sfnt_off00016211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16211 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A23 20224 bytes
SHA-256: b3ac9bebbfde347dcbc0014d2df6ee6ed9ebca5bcfa6dc2c3b526fc02590adef

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