Malicious PDF — malware analysis report

Static analysis result for SHA-256 95198bca3ba1e9a1…

MALICIOUS

PDF

87.6 KB Created: 2021-10-05 01:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 03e02565fd861689bae5492c0d75a99c SHA-1: 99d9ba42ff951f340bbc01b077d04c08839c5830 SHA-256: 95198bca3ba1e9a10c5fcbf2781e6475f5abac1c16bffa3af2398b70113b51d6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. This behavior strongly suggests an attempt to distribute malware or conduct phishing attacks.

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://cructi.ru/uplcv?utm_term=newton%27s+1st+law+of+gravity PDF link annotation
    • https://birotex.rs/images/files/25520849334.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72533820926.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/zewulazasozupavefi.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1613b04b8ebd5e---mepipusujufifonetabu.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/96426242367.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/rutexesepotozura.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/vuritunenasezejixiv.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/33531958629.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/migafa.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/gavoxazixiwazifisu.pdfIn PDF document text
    • http://0228339500.kad.tw/kads/ckfinder/userfiles/files/31841984430.pdfIn PDF document text
    • http://saconsultancy.com/userfiles/file/rewuwejeg.pdfIn PDF document text
    • http://effektfilm.de/files/file/kikapidabafo.pdfIn PDF document text
    • https://rippa.pt/files/file/fuzida.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/salusukumokerukezeb.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/66373095902.pdfIn PDF document text
    • http://baove24h.org/upload/files/67534637399.pdfIn PDF document text
    • http://escalierdurire.fr/ckfinder/userfiles/files/86461523954.pdfIn PDF document text
    • http://pedraferro.com/files/files/19096109598.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/42199233075.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/71287646536.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/wekawotimikulevebovobo.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_off0000ef94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF94 18948 bytes
SHA-256: 44eac503338b2dbc7eb4e089a869c33291edc8b6b25f178ed1f8933e2be00085
font_01_sfnt_off00012056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12056 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001386d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386D 10716 bytes
SHA-256: 4857ec655e510bcda5d5cb286d8eac82ffa8fe0ec770080be09784d3a31a1f4c

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