Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d7d0c4b68df4d9…

MALICIOUS

PDF

74.6 KB Created: 2021-09-10 16:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 17296135b214e655d4c193e47b43d861 SHA-1: 8f3b811fbdcbeb2df5d00a34bf21ca94c6cab308 SHA-256: 97d7d0c4b68df4d95161414c2c7fe0e9407de89ad4ea24a6821187368011c074
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://grafichesirio.com/userfiles/files/49039098850.pdf In PDF document text
    • http://fratellibeninca.com/images/file/midigopoxirokoni.pdfIn PDF document text
    • http://michael-dhom.com/webseiten/file/61517917207.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/78927376917.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/pisomebilekisanozizux.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/2460678676.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/14727207922.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/pirijeli.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/boteduro.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210906081917.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/bupikuzalukisamanavadana.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/kidam.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/26667092145.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/30262715631.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/92541394121.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/jezirifuged.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/befaxoratudener.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/13510235025.pdfIn PDF document text
    • https://dpengineerindia.com/admin/userfiles/file/33486815907.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134be1461627---46103105846.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/76236844786.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/2249722251.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/vakitawelutaketunenoke.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/fobag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=lait+photo+editorPDF 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_off0000bfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB9 18056 bytes
SHA-256: c0bab3434f2e119f6e9dd33a5eb44db23496b00f5c10febabb5760e63d11df66
font_01_sfnt_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B4 10128 bytes
SHA-256: 04e97e50a86d5a3e5736d52237ea6dbd86f5b4eed22be245e07b8187f3722cb8

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