Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a99ea462a76c574…

MALICIOUS

PDF

73.3 KB Created: 2021-09-11 00:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ca7cb970be56ce62a1a694b87addc82a SHA-1: 209dce16115b84e5b698ef3f6c376b4007b30aa7 SHA-256: 1a99ea462a76c574dd902439b3e75f48aa6d76a095973cd4f94c938f35a8cd8a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous external URIs pointing to potentially disposable hosting. While no scripts were explicitly extracted, the PDF structure and its classification suggest it is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://saleskerala.com/ckfinder/userfiles/files/34906541495.pdf In PDF document text
    • http://sunpix.ru/img/lib/file/bebubugov.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/tijinona.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/51236431570.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/78873080015.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/wojilavurapexomaleto.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/muvewusilewigipaworo.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/kudorururowodo.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/kirasufumatinafidupo.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/74184642095.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613adfd94642a---1095160054.pdfIn PDF document text
    • https://merlak.ru/userfiles/file/65871930982.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/menawip.pdfIn PDF document text
    • https://onsale.social-push.cc/data/fckeditor/files/zobolegujenevagis.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/13411329856.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/jedim.pdfIn PDF document text
    • http://whdhgs.com/uploads/file/20210903011724974.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/3s10afkoquplg71f2fl3o5m9k0/78856672905.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/78693045574.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/gixupotisoduxa.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/20228221744.pdfIn PDF document text
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210904181613.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=types+of+price+leadershipPDF 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_off0000baa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA2 10592 bytes
SHA-256: f236c0df98f868289dcf92cba91935aabcbe42c1d77b95760ca6bae0ea4f3c74
font_01_sfnt_off0000d2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EF 17740 bytes
SHA-256: 696d2fc434ab7c9b7d7a5b19e873777cb954e82c39f181cfc005ab4f8b620e7b
font_02_sfnt_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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