Malicious PDF — malware analysis report

Static analysis result for SHA-256 0224fdf590a5fa1a…

MALICIOUS

PDF

77.6 KB Created: 2021-09-18 08:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a53fa84b6f0520f3fccec6ce01445385 SHA-1: 195d3430435247502abea8557a78654570a4ee72 SHA-256: 0224fdf590a5fa1ab65c84a89aff86ac4703df60ee7f793d172b78dfe650e92d
142 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript which is flagged as malicious by ML classifiers and ClamAV. This script likely redirects the user to external URLs, as indicated by the numerous embedded URIs pointing to link farms and disposable hosting. The PDF's structure and the presence of JavaScript strongly suggest it's designed to lure users to malicious content or facilitate further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://archism.ru/uplcv?utm_term=how+to+restore+contacts+in+android+phone PDF link annotation
    • https://hoalavender.net/upload/files/1670661479.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/28145901883.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/161445c6acd6ab---91141372449.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/4148986778.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/89718378246.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/zotoganivuvapuf.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/34855897978.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/45688275296.pdfIn PDF document text
    • https://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/wugukuvinewumalepamel.pdfIn PDF document text
    • http://akatumusics-ang.communication-pro.fr/public/1283/contenu/file/ramozexugopikakifoxuni.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7e3804685d65e500f7bb9e40897cc51c/kuxopupewimenatejajax.pdfIn PDF document text
    • https://nada70.org/userfiles/file/gedezabobabusef.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/58182621161.pdfIn PDF document text
    • http://mq-water.net/upload/vofelefabagu.pdfIn PDF document text
    • https://servicepapik.ro/files/84066837513.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/vobukek.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/44871376515.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/fasumowesefefaku.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/98072487529.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/xebasirawefogetefutap.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/613b7217d1aa5.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/93193801486.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/wawudaguruximajopabifi.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_off0000c8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C8 10644 bytes
SHA-256: c68ee37d5b4a6381500ef5d449ee8d5d058a26409749d30a993862c0b7f44789
font_01_sfnt_off0000e123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE123 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 18056 bytes
SHA-256: bbe937e64af520aa000c90eef94edc207d1a583a86e865b2b74ca0194af9b106