Malicious PDF — malware analysis report

Static analysis result for SHA-256 b468092f59205bbd…

MALICIOUS

PDF

72.5 KB Created: 2021-09-30 10:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8058faed55013f3ded2d375b5b6537aa SHA-1: 79e0124ff02d5c928d6dba77f904d400cd020dae SHA-256: b468092f59205bbdb8580e072ed461ba2fa38460480b2896d1333bae8fdaba38
142 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script likely redirects the user to external URLs, such as the identified `smidgel.ru` domain, which are often used for phishing or distributing further malware. The heuristic firings and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=azzerare+contatore+dati+android PDF link annotation
    • http://ozona.pt/js/fckeditor/editor/filemanager/connectors/wysiwygfiles/file/gizudazunapilatap.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/83821937132.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/41080926860.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/23809097817.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/48247911330.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/17336087948.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/c7ohgg8hhn0vbnfp24c7293s31/duxafajaxutifezodoxa.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/79902164533.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/4295778875.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/20254643101.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/5526524517.pdfIn PDF document text
    • http://climtech.com/files/files/98918370928.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/dizibefozuritelev.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c16217443e---sevigugejusuvixafanefube.pdfIn PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/rogibegonuxezixovuzenitov.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/bafepenedopete.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/41946796423.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/wifirazusu.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/98317265008.pdfIn PDF document text
    • http://tonghuichem.com/upload/files/83952559632.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/86523420946.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/39881219650.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/75894119405.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/tawakofipuxifazobikadugef.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_off0000b522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB522 10188 bytes
SHA-256: a41eda0ede5d70e47296c27f41da2c35d35e5d258213d5e3da197f7a820b075b
font_01_sfnt_off0000cc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE438 18528 bytes
SHA-256: 7d4a07c59ec07364c4dfe59a73b6b8b62ae65f39dcc7626191a903b2a1147422