Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e65e62dcff22629…

MALICIOUS

PDF

85.4 KB Created: 2021-08-13 15:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bb35c548a633edfc5f3b96ad3e588f63 SHA-1: 3a5c37c7ccc62c3c74fc094de66e387080bc5eed SHA-256: 2e65e62dcff226296d783ff7e0c8b9705627f91e2010fcfc508e480d79965021
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/uplcv?utm_term=ernesto+sabato+cuentos+cortos+pdf PDF link annotation
    • http://analogsys.com/uploaded/file/181936202460f3fcba00022.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/zasoso.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/21129051010.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/26125849844.pdfIn PDF document text
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/runavar.pdfIn PDF document text
    • http://armanetti.com/images/89481727898.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/15024910847.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90ffa9556a---bedasupuzevidig.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095794b8bf34---12500989400.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/musukudejiratotamupewo.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/7bdcf71bba8831cd3171eba68c35e99b/54377856114.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d840ed08e36---zisutofigepowadasap.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/16835167311.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/6ff9ed11f316406d665870b3b847130b/kasefimot.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/59b3010ea9b0bef014e5ad936eb4842d/bowemiterakonogexez.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/d30c0bdc152f05e582a191f0e8cd4b38/nikijowefid.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/87415500513.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a3c55dd79---seresemokujekofu.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609700b4bffcf---87007345752.pdfIn PDF document text
    • http://farashimirooz.com/files/xizesose.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/21344458724.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/36371234202.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/19b833fbda9cb9c0d23025938c4045a0/rekexoxugajigar.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_off0000e3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 19352 bytes
SHA-256: 20b54203e4875b3810eae75e02a77a648ee0fe17865719020b078a1d9ba0f04a
font_01_sfnt_off000114fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FE 10700 bytes
SHA-256: 49d3a4f00fce0afb06d67b8c7dde40d0a16f5417618147583bc5d331cfb654b1
font_02_sfnt_off00012d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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