Malicious PDF — malware analysis report

Static analysis result for SHA-256 34700b88e0a41c82…

MALICIOUS

PDF

87.3 KB Created: 2021-09-16 22:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9590dd89ea41a8d42a44088a4e9aa978 SHA-1: 9d09e8c956c1dc81902ca4173a7d8a1a4434d4fd SHA-256: 34700b88e0a41c820e478829d1d457046dbfca1bb8914ffc62046d0e43c175c2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, including a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of embedded JavaScript indicates potential for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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 https://nomylo.ru/uplcv?utm_term=a+sound+of+thunder+pdf PDF link annotation
    • http://imhang.com/fckeditor/userfiles/image/bababevezor.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ad978282a---88200752259.pdfIn PDF document text
    • https://tch.lu/files/files/84232532011.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/xuguvubawunazaliwogipan.pdfIn PDF document text
    • http://mybyblos.com/userfiles/file/28154163021.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/6207461142.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210902040026.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/tolumatetizitorid.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/sadotexe.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210901091526_y66p1m.pdfIn PDF document text
    • http://hasomedia.com/userfiles/file/36162569825.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/14373465151.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/vovawomapijepuzito.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/lakalopetaxin.pdfIn PDF document text
    • https://underworldgear.com/admin/images/fckImg/file/gedewitebofazo.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee0b015170---83567158464.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/9728577215.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/rifosupuvi.pdfIn PDF document text
    • https://fasleh.net/Files/files/22888086036.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210903_840FFD976A6A4B4E.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/94875075318.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/jajaxutamulitikenaduluki.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_off0000efdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDD 10376 bytes
SHA-256: 8800ae5d384bd821bdbf41e2579610e77892ce1c0cae9d34cd891f993c3bbe57
font_01_sfnt_off00010751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10751 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F63 18884 bytes
SHA-256: e0ab0141dea1495c7f57e8c7c55cb06fe91a7deb4da4c7a169c13780afb8e22a

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