Malicious PDF — malware analysis report

Static analysis result for SHA-256 0581219ab414a7ef…

MALICIOUS

PDF

83.6 KB Created: 2021-09-20 04:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f1cbc42465d880e57f91f3e652ec9f6f SHA-1: 5af6f891252a865ad1965e51b1594d6a97ef883d SHA-256: 0581219ab414a7ef864a5dd65e4234a13921d132511e2629f04ea9641ca61e19
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document attempts social engineering by prompting the user to install a browser extension or update. The embedded URLs likely serve as the distribution points for the malicious payload or further stages of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://pistant.ru/uplcv?utm_term=fs+14+hack+game+download PDF link annotation
    • http://holland-ex.com/images/blog/file/suwofenatevu.pdfIn PDF document text
    • http://vning.net/filespath/files/20210909055656.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/91201275792.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tibimazomalinawazidilum.pdfIn PDF document text
    • http://jimsclub.net/new/board/img_tinfo/file/20210913023056.pdfIn PDF document text
    • https://drlalashow.com/php/billboard/uploads/file/36000735696.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/94390940103.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210917_26141446EC71D5EB.pdfIn PDF document text
    • http://nhadephoanhao.vn/upload/ckupload/files/44536381639.pdfIn PDF document text
    • https://almavilag.hu/files/files/21653073883.pdfIn PDF document text
    • http://pb-book.com/user_file/file/36793147286.pdfIn PDF document text
    • http://imaginove.eu/data/Files/nuzuki.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/49657587819.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/vajosawifedezudafijene.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614164da47f2f---21329592846.pdfIn PDF document text
    • http://svarovani-tig.cz/userfiles/file/wegiz.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/kolumo.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210904053457.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/94493743825.pdfIn PDF document text
    • http://fsanaq.com/upload/file/2109181532142946278d4p8eoozxv7.pdfIn PDF document text
    • http://joomlacode.org/fckeditor/editor/filemanager/img.php?file=file/zufebataz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 10812 bytes
SHA-256: fb8da9c7ee309d0a5f47395e72107ca259ed3a08f7632c364d4246d54099febe
font_02_sfnt_off00010fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE3 18752 bytes
SHA-256: 058ad08cea4c744f33edd44bdb4012d0eeb7828e8c50a7cb8ebe581a3125ace9

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