Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce2d752820e0cbf…

MALICIOUS

PDF

69.6 KB Created: 2021-09-25 13:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d65a3d099c6b76af2ccae1f15c000667 SHA-1: fa5c4f66d407944cba0c6de87e133f5ce56597d4 SHA-256: 9ce2d752820e0cbf58fdad0b5e75d5926fa73cf99a8a00f412cba17c4c50cb76
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a link farm or phishing lure, directing users to potentially harmful websites. The PDF structure and embedded content are consistent with techniques used to distribute malware or facilitate phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://chcial.ru/uplcv?utm_term=the+mothman+prophecies+pdf PDF link annotation
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/78434064153.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/85646931565.pdfIn PDF document text
    • https://tamphuctriland.vn/upload/files/15817633609.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/vajamigejaxiwejamivideko.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/29402062259.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/59840991332.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/mazogotazanidikezoz.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/rojije.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/6f643fd59e7cd24f8f616be8b8f87f55/wijoxelotu.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210912225913.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140b9a5c3015---15819399111.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210921045907354.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/58439093671.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/80251184196.pdfIn PDF document text
    • https://tavio.ru/files/file/82622532019.pdfIn PDF document text
    • http://unsersohn.ch/images/file/85582710433.pdfIn PDF document text
    • http://gospodarstwotoporow.pl/uploaded/file/vefazefof.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/66716653142.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/jamizavirogidawa.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/subadufo.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/gubizudanojagetijuzu.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_off0000aee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE1 16264 bytes
SHA-256: 8567270ca5b1315e99ffe3228444387c9f3bd3cf9ad2240e8958afe2770a8a9e
font_01_sfnt_off0000d850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD850 10800 bytes
SHA-256: 0c52b1151ddd06ce0cf6e68313d942aec6ca7bdf5567f9124665e33e746e32b4
font_02_sfnt_off0000f102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF102 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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