Malicious PDF — malware analysis report

Static analysis result for SHA-256 410bd12beae2bc1b…

MALICIOUS

PDF

72.8 KB Created: 2021-09-16 03:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ad18c0e12ef022cb42e72d39fe6c2d0f SHA-1: e7a4027c5e233f6d09d0acc67b99ff2a1bbcb995 SHA-256: 410bd12beae2bc1b430a1c59377d12c50de58b4524a99c10a9b36504a483b308
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URIs, many pointing to disposable domains or link farms, suggests an attempt to redirect users to malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving phishing or the delivery of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://igescanada.com/ckfinder/userfiles/files/46840350832.pdf In PDF document text
    • http://eis-pieschel.de/UserFiles/File/misilejiradixoxikar.pdfIn PDF document text
    • http://expertworker.paraleumarian.ro/app/webroot/files/userfiles/files/14480686886.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/vudadipiwaxoti.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/96746103105.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/16730533046.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/svj4ki6jeta9siobv6ca9hc27v/xavurosizimuzutekul.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/tudukobek.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/kudetas.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/5655068692.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/21364286865.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/jurixujewapedakab.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/fagimuf.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/91950829196.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/26179677291.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/161399482accc7---3152597096.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/26583456551.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/palok.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/bosivebewawov.pdfIn PDF document text
    • http://meta-min.com/files/gerezewe.pdfIn PDF document text
    • https://paperland.bg/uploads/file/71836400097.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/vegiwusibitazusoreli.pdfIn PDF document text
    • https://harom.ro/files/file/sapiripovesox.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/65309587234.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/63893022160.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=logo+design+app+for+pcPDF 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_off0000bde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE0 15796 bytes
SHA-256: f9fd491534cc0c876bd9eda10730e94f09c70bcda225b72bb6d2621989c14fd4
font_01_sfnt_off0000e5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D7 10608 bytes
SHA-256: c398305aa7758500fac59a69f69bcab56803b0e1c773f2bd63f860503d4b32e6
font_02_sfnt_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1