Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d47030932f17214…

MALICIOUS

PDF

82.6 KB Created: 2021-09-16 15:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fb78bd95c2df1487fa0a37068c259bf7 SHA-1: bde21e87a25bffc997568b31259edeaee2792f3f SHA-256: 7d47030932f17214e3a2aaf1e2b28ecaed7a72dc5eb328bf88ca7c9338acb693
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting the user to one of the numerous external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://araprinter.com/ckfinder/userfiles/files/75849792264.pdf In PDF document text
    • http://sapaelitehotel.com/webroot/img/files/xelipagoka.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/luluxuxobawupemabi.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-7/20210907150549425920.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/86083765793.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/96660639297.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/33720088363.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/21629416244.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/7880350186.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/8773751830.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614011c664804---majurazotaderexod.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/2bba32d3d2196d3168246b26fc1a5542/lalelemenogovuvipapurovo.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/46254215759.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/82748229107.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/zusexotezapikokikozinub.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210913021457.pdfIn PDF document text
    • https://hobbypet.cz/files/file/30681790140.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/tafojubowiwilarogem.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/wivimoripe.pdfIn PDF document text
    • https://karaari.leaddeehub.com/userfiles/files/tunobo.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/nokovebi.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/zevubiwilifi.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/85747543571.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/runotawefitopuwutixib.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/pojalusege.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=android+full+screenPDF 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_off0000df61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF61 17944 bytes
SHA-256: 80cf8d414d719966835cd34003bd991c92ff6bb4f6f6e4bbc8fca8080121ec91
font_01_sfnt_off00010d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A8 10292 bytes
SHA-256: 1e0b9cb89c3a00fba7d436aec56da7b75d9baa893ec57819a0d400cb0d5606c9