Malicious PDF — malware analysis report

Static analysis result for SHA-256 207a4a4d3b5becf2…

MALICIOUS

PDF

72.6 KB Created: 2021-09-12 11:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 17cdff52556e5196e95e6a7205ca1d74 SHA-1: 9c57e23355fa92f1f6cc06f43876a35611567718 SHA-256: 207a4a4d3b5becf2bf1d748aba83ec9ef6764a27fb51a947234b4523efb02170
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also contains numerous external URIs, many of which point to suspicious PDF files, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bestbelly.org/content/files/files/koxonuweluzemikaxitemot.pdf In PDF document text
    • http://etkindenetim.com/resimler/files/diwowuwasologuluwapav.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399cdd1df1d---bagizajegemilazelez.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/vuvamoru.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/zolejemufo.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/65027120212.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/pakojuzesokawudoxu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b08ff9985abc84ec76e7881ea880b4c2/dowimususugu.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/94100207673.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/sorolekabojiwizijikenijav.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/gunejubomabudirup.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/kaduguledosupokuvidepon.pdfIn PDF document text
    • https://wmu24.ru/media/file/fudojulenomovitujobojod.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/80578497346.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/vakigofetamujokotuzu.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/34440804351.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/51465392008.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210903150639179.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/20583589533.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/letisanujosekisururas.pdfIn PDF document text
    • http://eichler-kammerer.de/45167990049.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/fazitetipe.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/32512221953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=the+thing+putlockerPDF 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_off0000b960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB960 16900 bytes
SHA-256: 1c1126df06607967cf7ab5a7809ec2d77e9af7df4b117f74dc233f62cedf3e71
font_01_sfnt_off0000e561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE561 10480 bytes
SHA-256: 399e8fb49996bfbbcc152f64c44ce9b50f9f41a8fac42d24bc1f6206a5431910
font_02_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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