Malicious PDF — malware analysis report

Static analysis result for SHA-256 326773ccbdb1748a…

MALICIOUS

PDF

77.6 KB Created: 2021-09-08 22:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e4cb52ab4d52e6d1436d0121ffaf1308 SHA-1: faea0fd7203672b06230c26e708075e9be7dfa26 SHA-256: 326773ccbdb1748af0e3c6364dd6d76f74ef33fad77f9e023fb677037cfa5352
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to compromised sites. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://oniceh.ru/uplcv?utm_term=zombie+objective+mod+apk PDF link annotation
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16132a29ba5f62---19339391245.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210904_E4853B413CA8CABD.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161374ce4c0f32---tifilapa.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/gokegukuxufenuk.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/metidozosubedo.pdfIn PDF document text
    • http://maxbrio.kr/files/files/zakanisuwawamada.pdfIn PDF document text
    • http://contelex.it/userfiles/files/76072372820.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/74302942076.pdfIn PDF document text
    • https://nexusmediation.nl/files/30708586482.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/tasewelen.pdfIn PDF document text
    • http://goldia.cz/data/file/26982599409.pdfIn PDF document text
    • http://swissies.lt/ckfinder/userfiles/files/joboxakukuvuwa.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/wogelanedisivapetuloziwo.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/topotawamib.pdfIn PDF document text
    • http://elitvorota.ru/f/file/42486615978.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/nibuporepuvif.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/30768728023.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/44013359989.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/nuvogepo.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/belefaxaxarokujusopareg.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/61145578194.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/59232752844.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_off0000ca2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2E 10648 bytes
SHA-256: c6e3ff15b9383ec4b5fb8426ac6115730673f539c709ceae24830800d89f7602
font_01_sfnt_off0000e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 17760 bytes
SHA-256: c35000dc23c4fd095c8e855c98bf452964a0210599805409f366593d0b9faeb4
font_02_sfnt_off000110bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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