Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed998e0d0308b60c…

MALICIOUS

PDF

70.4 KB Created: 2021-09-25 07:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ab1e73b3f8c984533636cace560a6dc8 SHA-1: d492aa28844aab2567264d9c8ae79e51171addd3 SHA-256: ed998e0d0308b60c8e6c3c3959d481f797de896a6f68584b7e864636f75a6888
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with a high ML classifier score and ClamAV detection indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is part of a link farm on disposable hosting, pointing towards a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the download or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dianthusindustrial.com/resimler/files/dazababi.pdf In PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/pojesonat.pdfIn PDF document text
    • http://flyingwedge.com/uploads/assets/file/jelafenididajowapanu.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/8065214770.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/wilexutifi.pdfIn PDF document text
    • http://boldogelet.hu/media/71359884047.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/fosumelarinekapunofomob.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/15498845837.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/19550767535.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/31400034299.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/fibojapinerexafivog.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/4c50b37699bd44a1cb8c3ee805611bf4/31101920490.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210916193339_1170054513.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/198a4eb00326fa1f189585e50b9e453d/vaweri.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/xanoxojezifexawonofalena.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/40379623319.pdfIn PDF document text
    • http://rabwork.com/media/file/lafojironibidubigo.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/jowiketumejowokasep.pdfIn PDF document text
    • https://hse.tw/upload/file/22695251102.pdfIn PDF document text
    • https://fong-cai.com/upload/files/56764738913.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/bozisaxunisejunebofubi.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/97857913556.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/98354260748.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/95657040215.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+delete+hotmail+email+accountPDF 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_off0000b1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DD 16764 bytes
SHA-256: 1c2a054baff36e5b27951f1cf7c212db03bc270579c21be467d8eae911ebb389
font_02_sfnt_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 10544 bytes
SHA-256: 8fb121c141717c9f949ec9ae4691c9211fe3e8725233182b603d49e2caa6d5d3