Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea39b918f91f2866…

MALICIOUS

PDF

64.0 KB Created: 2021-09-11 10:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ab52dba616dcc1c5e65711ebb4747fab SHA-1: eaa4f3f35aa8038eae3fa399423de158a154618c SHA-256: ea39b918f91f2866f335f0576958d2b293c01b9d10367badec5039b55fdb0eb5
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating a malicious intent to redirect users or download additional payloads. The ML classifier and ClamAV detection strongly support this assessment. The presence of JavaScript points to its use in executing malicious actions within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7155

Heuristics 5

  • 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
  • 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=export+and+import+chrome+history PDF link annotation
    • https://alaskaproauto.net/nbloom/fckuploads/file/33330590633.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/21806111325.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/55699120626.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/tgssk1ec5129t222j0ga87pmnl/34519935373.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/gazenotevonevesorivimoj.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/27655180324.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/kaxolajimevekoxi.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff8dface28---dopixazipelusuwujuxagidez.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/29654550542.pdfIn PDF document text
    • http://www.idukkidiocese.org/files/js/ckfinder/userfiles/files/37743676481.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/lijazasuwodepegewikog.pdfIn PDF document text
    • http://ubest.ru/images/file/18867387634.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/72058784253.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/62563072513.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/15705528866.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/55527835479.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/fibatakowexaxekimavibi.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/40431234392.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/rutowipodalibute.pdfIn PDF document text
    • https://sofupingame.net/calisma2/files/uploads/11956921370.pdfIn PDF document text
    • https://jagominum.com/contents/files/1380248973.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/kidiposetupovizubor.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/50592187893.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC9 10932 bytes
SHA-256: a8f1ace1e034ad6ab8cc9a3b655d5089de58fd938d46ab342104ff277f750f11

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