Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5df9099fc3aa73e…

MALICIOUS

PDF

85.1 KB Created: 2021-09-14 02:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 47467c5da9a3036fce01373e516ecfd4 SHA-1: 1c97e0f71e7aae7035af90d0307ead056c026c48 SHA-256: b5df9099fc3aa73ee2e75ae968cfae7d054fa9875032474e3113ad80643226c7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://sunnyvale.com/wysiwygfiles/file/namubixiv.pdf In PDF document text
    • http://elementsgogreen.com/userfiles/file/fobuvabi.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e60cf9313d---zamobojane.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/31468684346.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/72339433618.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/bikakuvojexapapirizab.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/55053606997.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/vovumusogepogiganekimowej.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/pidemabipusiwedariduruk.pdfIn PDF document text
    • http://topaslt.com/userfiles/file/gopuvixuwawoposibazex.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/4115999187.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/vakutufosupuk.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd4f7a7f3e---lamazaxiwabisa.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/31162937443.pdfIn PDF document text
    • http://allasclub.com/campannas/file/46605755982.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/wizoxipazeg.pdfIn PDF document text
    • http://camdohungdung.com/upload/files/68336723087.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/ranivekoduwafawibes.pdfIn PDF document text
    • http://ekvatorbl.com/userfiles/file/26427597586.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/devuxosiwaxum.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021091405454348.pdfIn PDF document text
    • http://copy-office.it/userfiles/file/36229412695.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/katimaretopob.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/bamabij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=massage+elderly+contraindicationsPDF 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_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 18464 bytes
SHA-256: b86a1a45d98d39a255899d8ed52e499be5da2ab5ccad7cf71e8159fb3e3e0151
font_01_sfnt_off000115a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBF 10652 bytes
SHA-256: 86eee0e0519c472802e5ca81cadb6a51f518bcb668a3c01747b8c293b725dd0f

Open this report in the interactive analyzer, or submit your own file for analysis.