Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ad86d720bb9222…

MALICIOUS

PDF

81.1 KB Created: 2021-10-04 12:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 8a65f4a77d865e2ac4f8068ca6c181c6 SHA-1: 1fb42da1cc61a7df9eeab645d261dac896cc2c6f SHA-256: 96ad86d720bb9222350b637aec1f133ecf9b02605007260a6dfaee4fb52b835d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external links, many pointing to unknown domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to facilitate the redirection to these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • 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 http://sushikyototogo.com/uploads/files/5018841335.pdf In PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16150e693050af---tinuxewowopuwejetumejapu.pdfIn PDF document text
    • http://apcmagon.com/userfiles/kofoxo.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613d828f15125---piwuvexabetokeru.pdfIn PDF document text
    • http://poornasreehomeoclinic.com/ckfinder/userfiles/files/15534756161.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/xogakezo.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/11529703335.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/xexomezoke.pdfIn PDF document text
    • http://bociany.sk/media/file/nigujijinepoxo.pdfIn PDF document text
    • https://hot-pol.com/images/file/vizijasonusimelape.pdfIn PDF document text
    • http://keacg.com/upload/files/48560996308.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/xazuzudaxinima.pdfIn PDF document text
    • https://safehouseservices.in/fckfiles/file/88236478965.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/risurigifipakolatudipesav.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/varag.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/fagipiwefefuki.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/boxoxes.pdfIn PDF document text
    • https://kaparatt.com/images/File/lejoviriketuliridebevat.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/bakatorejimu.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/sovawadutubunaseji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=i+just+wanna+be+loved+by+youPDF 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_off0000d533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD533 10636 bytes
SHA-256: 0742327dc12f954c2bc80c52b1ea01b4b3f7c814a82d5af692aadcbd8cb2e3cc
font_01_sfnt_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 19212 bytes
SHA-256: 3b29f290d423f9d805dc321e2c2d5bf628de8b8b50c530a4efb6d085791f20c1
font_02_sfnt_off00011eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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