Malicious PDF — malware analysis report

Static analysis result for SHA-256 9422f4efd8aac0f4…

MALICIOUS

PDF

75.4 KB Created: 2021-09-13 02:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 47bd6ecbbd586a54b51059575e491499 SHA-1: 88588db3744cf1c8fe3d888241fa2a11e97a52ce SHA-256: 9422f4efd8aac0f47249317fc4af8372f1c284b3ea071b2e2f3bab3d4f1e24e7
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. Heuristics indicate the PDF acts as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://medeeatour.ro/mm/file/xufolifupo.pdf In PDF document text
    • http://wu-pao.com/upfiles/editor/files/momebojirebakugoxuwa.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/30468839513.pdfIn PDF document text
    • http://tottazo.com/userfiles/file/wotudajixuwavafava.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f60014fcd5---polukogelazepu.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/77928373866.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/nofegipuvutomatomaximude.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/barogiveximaru.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/70700279227.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/46695166859.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/lotizarefavisosebezonatap.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/3f247e7f7050b3f4c9d56e9fef5605e2/77424071962.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/lezax.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/15315021550.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/b050e23a6fe184a395517494565aaff5/56144754158.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/xabezoresutiporakekoviwaf.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/bafokisilejagonamufus.pdfIn PDF document text
    • http://soupworld.de/upload/file/77637692242.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/8837417216.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/21i9p992dmc79vcmq5rf0v9ad4/lapitexakodug.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/sunevix.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/8190184899.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/161396a388ca34---pudaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=sandeep+aur+pinky+faraar+full+movie+download+480pPDF 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_off0000c09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC09D 16960 bytes
SHA-256: 8be1d608af26639db36a58781cfa58c96c18b409e66c54adf27d0bc4ac9dcc72
font_01_sfnt_off0000ecc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC2 11336 bytes
SHA-256: f19e942a6151eb784b4ba76599dc767b3fc20f256e03a3813fb7f6cf5be0ce78
font_02_sfnt_off00010775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10775 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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