Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b3624902683a0a…

MALICIOUS

PDF

77.7 KB Created: 2021-09-28 11:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c7a3bb9e6ea077dca453bd49b1350049 SHA-1: 343de0340d33e8516ed202892198afa3b3742296 SHA-256: e7b3624902683a0a09e61692980e72a54fc494caff314b56d7539c160f466808
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, with many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the execution of malicious actions or redirects the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://dolekkoyum.com/admin/UserFiles/file/bozijolavabanoxokugujozex.pdf In PDF document text
    • http://dreamsurgeryen.net/ckupload/files/magevoxezitureketal.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/26474692909.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/gibodavamugatonirisebez.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/viwoxunazododusaxobupefot.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/saluvopinafefamud.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/wesozumojomezijasu.pdfIn PDF document text
    • https://ivantomanov.com/userfiles/file/23321906486.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4a6d11a64---jabip.pdfIn PDF document text
    • http://vividconcept.in/userfiles/file/93052017449.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/14997722432.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/96899229839.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202109162102373727.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/61191251172.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/vozapigodogesaguxaz.pdfIn PDF document text
    • http://drironcat.com/images/file/23959238046.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/77710251652.pdfIn PDF document text
    • http://hotechike.com/files/files/woladixizorewabojawu.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/64768612255.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/texekokagizuvabo.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/9f07fcc23ac17c210b8d9c5a55fb5e19/fenogizulonivun.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/40871208856.pdfIn PDF document text
    • http://soc-in.com/data/media/files/bevidoxaxi.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/42804071855.pdfIn PDF document text
    • http://vvk-wiedermann.at/userfiles/file/lelubuxud.pdfIn PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/mulexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+change+password+in+outlook+android+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_off0000c127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC127 20556 bytes
SHA-256: c94b8fae35fa48072d50c0aff1e2a19be3cc88f17490b758ea0b5cae4414f8dd
font_01_sfnt_off0000f6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE6 11064 bytes
SHA-256: b180d5d74d19e5b91cb80c7a6ffb598c39062a27fc545cc204d309bd02e759bf