Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72ad087681b9bd3…

MALICIOUS

PDF

84.8 KB Created: 2021-09-12 02:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7b241492921fc091565d89fcca004d2e SHA-1: 805bba7787d1f755fade0751b039e65c48d568a2 SHA-256: f72ad087681b9bd385395b2b46c269a16276b724992fb3a2b677fb408293b38f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9964

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://eminencesolutions.in/resources/userfiles/file/87292754077.pdf In PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/xuwumumo.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/rotufugapunemibokuf.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/17258185389.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210905_213600.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/14014388342.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/buzosudefusozujofamufare.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/9812330459.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/12945949045.pdfIn PDF document text
    • https://brigitte-farner.ch/userfiles/files/36373891286.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/pobasowo.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/b2472f5834bea89c8f141dfcce1c9334/zetekekoduwexizinen.pdfIn PDF document text
    • https://fond.ru/userfiles/file/22539838894.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/zazukepunonaxuzidixiw.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/419231602511630711761.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/66608818406.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210902_40A73549C964FF80.pdfIn PDF document text
    • https://theptaynam.vn/upload/files/9134113309.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/57222209043.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/1640568667.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/jirulajafedupubu.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/33173942323.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=web+series+app+apkPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 18584 bytes
SHA-256: 0900abf5618aad451118d413ecd83c6e61252a9ebae01c146ba1599c45dc0776
font_01_sfnt_off00011772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11772 10100 bytes
SHA-256: 5928828e0d2cb512606e02ba89fea592d158df4c872d9d907e40394d58e9f7e1
font_02_sfnt_off00012de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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