Malicious PDF — malware analysis report

Static analysis result for SHA-256 478d44aea373807e…

MALICIOUS

PDF

54.6 KB Created: 2021-09-12 04:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 5c68e26754a8f50e110f1cee40c8e475 SHA-1: 31c6d27e6d153f408b870ac932e836ad14c46448 SHA-256: 478d44aea373807e0316fa0c76445f65141230faa9eb5e01dd21779f416c1932
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script is likely responsible for redirecting the user to one of the numerous external URLs found in the document, which are often used for phishing or to download further malicious payloads. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7013

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 http://icltindia.in/userfiles/file/18811450687.pdf In PDF document text
    • https://vinniescustoms.com/userfiles/files/67537935856.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/tizinada.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/rulawuxoratun.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/luzimowewisaxegeje.pdfIn PDF document text
    • http://www.idukkidiocese.org/files/js/ckfinder/userfiles/files/dawafivekanamu.pdfIn PDF document text
    • http://rococosofa.com/files/files/47538126551.pdfIn PDF document text
    • http://k1a.ru/images/files/file/95600493300.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/lewijivodaluw.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/xujujosogifelaxum.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/39917658254.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/taxepetisej.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/modetasegaxirox.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/94561984457.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/99131015758.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/pudoduvelurogafod.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/5952575316.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210906092024.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/bebow.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/vadawazovufaxuw.pdfIn PDF document text
    • https://kultmotor.hu/images/files/givatukozuva.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/63571915443.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/4958784510.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/6273429368.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/koxike.pdfIn PDF document text
    • https://visualarchive.bg/files/fefitevogijedota.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=batman+unlimited+monster+mayhem+full+movie+downloadPDF link annotation
    • 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_off0000b6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1