Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2e5e5b8f1a132a…

MALICIOUS

PDF

84.9 KB Created: 2021-09-17 06:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7d15864548688c3d2fe44e8cc79b5863 SHA-1: eb5af4216eae7b2f2ce84050ac66fc8b349e89d5 SHA-256: 5e2e5e5b8f1a132a8c76ffae17601bfe9d2c8f196153a2b2de04dfc78705d7b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a link farm designed to redirect users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high likelihood of this document being used for malicious redirection or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://coretry.ru/uplcv?utm_term=gtb+app+for+android PDF link annotation
    • https://seeyounow.net/userfiles/file/konap.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/30169281662.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/80124823191.pdfIn PDF document text
    • http://snft.ro/media/file/rokugasodamavawem.pdfIn PDF document text
    • http://intersonik.eu/upload/files/2794947164.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/20428845262.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/2945464864.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/95857627133.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b7fd14c303c6d9a584471e1dd62749ee/57026117017.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/75894805663.pdfIn PDF document text
    • http://boki.hu/editor_up/49650020517.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/41708909840.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/82470379743.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/56360709737.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/91022172598.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/56314839423.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/nezavulaverozexu.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/19291179874.pdfIn PDF document text
    • https://profesa.net/userFilesfile/29274833321.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/maxobazi.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16139f96f87837---49453102257.pdfIn PDF document text
    • http://cutskytools.com/d/files/tidepaxa.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/suxujomedere.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_off0000dff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80D 10324 bytes
SHA-256: e1b877e8be30c1bb589493e96f96ededc4c5de80e81acd8adbe6399468e899f9
font_02_sfnt_off00010f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F32 20888 bytes
SHA-256: aea4c81f770e585791c908a6d4f73c5d6cb11c6d68bf8809da1b4fec53da9bcb

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