Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a8b5286b3dac96…

MALICIOUS

PDF

73.2 KB Created: 2021-04-28 22:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd7ce473437dc305e1b578e8dda2e015 SHA-1: bb4a9aad3777488bc3f6e0b9f0f39f2eb6825dfa SHA-256: 95a8b5286b3dac9675bb565fdca39f3679de32f64f7a419be8b6e7e14be052ee
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URLs suggest the document is part of a phishing campaign, likely attempting to trick users into downloading a malicious plugin bundle. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849d4d701bf---tirodita.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607633cb28c93---34055569054.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160786df5bbe36---9925076336.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9aa9596f6---nejopixetodexato.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/d722394094862541651367f9bcee9d7c/junibizonowadupumad.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cfd8a3325---sovimokilavitetalunobejuw.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad723aad13---19515077974.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607612d55f295---36051971931.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089974ca5d02---93787100742.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864e23ecd2f---18980468258.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/1608a01947ede6e9de0dff87ce87bc1b/63259577947.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d751c4d246---55472751369.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5c2b0bffd---xopowewosixuwofiz.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/84be89ec7bd812f0ea6dcd9b7b35a348/29605981152.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d77b418d0d---pipiwebet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=avid+complete+plugin+bundle
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34c.bin
78e43549d8f25d531d28eee714259924d8da38ca11c275b6fca1aa648c41cbab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE34C 5100 bytes
font_01_sfnt_off0000f49c.bin
a2355510a839acc5849b4acb6e5cb7857cfb02eef6f1531d17461fd0c6316483		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF49C 10844 bytes

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