Malicious PDF — malware analysis report

Static analysis result for SHA-256 e733c3d67e7b8e23…

MALICIOUS

PDF

71.9 KB Created: 2021-09-19 12:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5e70632f0bd3b61c548ea371b8512640 SHA-1: 8f60d3231f4e9b972d096c0b806ec19964cee88c SHA-256: e733c3d67e7b8e23a9021b09b669c9fdf22bec602b663a68620bccd607123023
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used in a link farm to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://infrive.ru/uplcv?utm_term=kaanta+laga+shinchan PDF link annotation
    • http://anhbanglaw.com/userfiles/file/59059191075.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/vofilizenokediz.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/64700035535.pdfIn PDF document text
    • http://klemanpince.hu/files/file/fedawibufofagoj.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/86071329180.pdfIn PDF document text
    • https://sklepbonus.pl/userfiles/file/minukolodivaba.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/41358935841.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/lumemuwaga.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/tesiguxejotikiso.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/fesawiwoz.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/bawevo.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144093913415---98977508691.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/61602392244.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/436f756611878ee540baa554e5c8d70c/53110602960.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/44132829577.pdfIn PDF document text
    • https://chp-travel.ir/data/file/femono.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/48087063749.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/bisoje.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/70841501282.pdfIn PDF document text
    • https://alpinashop.bg/files/64258275031.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/43488306315.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/9760757965.pdfIn PDF document text
    • http://ktcz.eu/files/files/85537410145.pdfIn PDF document text
    • http://korytnica.net/data/files/66203983374.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/57804866407.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_off0000b8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8DE 10148 bytes
SHA-256: efbf95d4ad233e598b4ca91ec290a8d2fa0f2e96e7984762d2653bb4c154b2ab
font_01_sfnt_off0000cf7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78E 16552 bytes
SHA-256: 40c77b96c60bf6322a93160e3bbff6dde6b06a2ac8d88eb7644ef446b2b8c645

Open this report in the interactive analyzer, or submit your own file for analysis.