Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c426493a2cf67c4…

MALICIOUS

PDF

77.0 KB Created: 2021-09-18 06:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 95370cf9d65515bd517bb78975e9ec09 SHA-1: 2495ac0bc5e4edc6054ff5e00fe16f606e15cf58 SHA-256: 9c426493a2cf67c49864cfd9a47d02302ade6c610205f7f9071592158661514c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous embedded URLs pointing to suspicious domains, many of which are structured to appear as file downloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being part of a link farm designed to host malicious files. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML classifier's high confidence score suggest a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://hulstcustoms.ru/uploads/files/jikemojisabopimojuzenija.pdf In PDF document text
    • http://brandnewgoods.net/userfiles/file/pufededovoxudisufesuget.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///bedidopulexeruwepu.pdfIn PDF document text
    • https://alternativi.brtim.com/uploads/wysiwyg/files/wonilirofukujula.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/ravanu.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/gimodipudogumipot.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/mezokuwelajevemisexedusi.pdfIn PDF document text
    • http://esejsc.com/upload/files/9121148323.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/25410138723.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/25nvhf0ggro51dqkrm3qrl7045/61539115118.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/puluwurov.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/66937329280.pdfIn PDF document text
    • http://edituj.cz/res/file/xisowopakefosebus.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/jagalo.pdfIn PDF document text
    • https://limadelimon.com/images/file/27631498923.pdfIn PDF document text
    • https://arerp.kr/data/file///30284434484.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/levabajun.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/84475166272.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/bujizabulilomonuvag.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/donelepaxafamuw.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/22906268153.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/firufakebomi.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/161438e6ace517---7523374881.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=hacking+karne+wala+appPDF 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_off0000c19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC19A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B1 10332 bytes
SHA-256: d322ee0ad40217b0e7657208d888f1cffb17661485c1d065f6526b2d6e5d3a73
font_02_sfnt_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 20156 bytes
SHA-256: 3c8ca6fa13a867856ce91b4b516d61897e2acf1d2928e9babb99539e96e632cb

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