Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05f20124a870667…

MALICIOUS

PDF

83.1 KB Created: 2021-09-21 00:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0200d020a06b07ff827e861a44a522ce SHA-1: d96782873c6525c571d05067b4855b30a069e705 SHA-256: f05f20124a8706674846f010089edc4ac255bab296f8a38d94e615c5c4b2e84e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of JavaScript actions and a large number of embedded URLs, including those pointing to link farms and potentially disposable domains, strongly suggests a phishing or malware distribution scheme. The file likely attempts to redirect users to external sites via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://garglob.ru/uplcv?utm_term=ps+touch+apk+2020 PDF link annotation
    • http://shethof.ch/cgi-bin/dynamisch/file/jizikizonaxukuse.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/miresamadufamijob.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/natowuruxi.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/67943914554.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/51208935889.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba950c3117929781122cd1c8a61ade34/kejeliw.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/7099679280.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/bowilubotolomokawoxu.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/rimirulepozum.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/42038813349.pdfIn PDF document text
    • https://hoavily.com/uploads/files/gilemokawodubizotuvik.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/repareliwizuriwanimo.pdfIn PDF document text
    • http://rc-modeller.se/images/file///18739439511.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4942019930.pdfIn PDF document text
    • http://gkz-crimea.ru/userfiles/file/jikorugubunejexovo.pdfIn PDF document text
    • http://biosystech.com/pdsFck/file/xejajezikokebima.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/ladezerufukabevesovura.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/ropobatapiwezapokesavib.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/janulexalugiruvaterigonim.pdfIn PDF document text
    • http://nawarashop.com/phya/ckfinder/userfiles/files/87371935061.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/70340838195.pdfIn PDF document text
    • http://renknh.com/ckupload/files/gakasata.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0919/65e4d190ef3efb74ccfec6512d0f8ba5.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/vipisukud.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/soputadojozepuvakedefete.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_off0000df77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF77 18268 bytes
SHA-256: 809f0e80b535e97837323564ca17d973d6be8d77e272f74fd96a829eb7486cba
font_01_sfnt_off00010ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE8 10432 bytes
SHA-256: 6da17ce7a4529d07227cf5d6ef1302d4cd861223a0f2bba45f6c9cdf879640fe
font_02_sfnt_off000126da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1