Malicious PDF — malware analysis report

Static analysis result for SHA-256 1102f6f903eaf525…

MALICIOUS

PDF

75.7 KB Created: 2021-09-08 15:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fc34c49c8e6c3c59ea925f2a63f12605 SHA-1: 0f4967b9de8796924c69deaf5eb3e889933c718d SHA-256: 1102f6f903eaf525a929e6f0d45cbb6266c2659e1c322ba88abec29030b26c61
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm designed to redirect users to potentially harmful sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies the document as a non-clustered link farm on disposable hosting, reinforcing the phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://catamma.ru/uplcv?utm_term=investigatory+project+in+chemistry+for+class+12+pdf PDF link annotation
    • http://imoroz.by/upload/file/70524269559.pdfIn PDF document text
    • http://om-ar.com/userfiles/file/82551196029.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/2346367663.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/deluxebomodazaveziji.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/12233047644.pdfIn PDF document text
    • http://camdohungdung.com/upload/files/91732229704.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c5174a08b---mevopegepa.pdfIn PDF document text
    • http://jucal.es/images/file/sasafovurelivezeravimuxeg.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/givizixogilolebisaturax.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/kovorobilisebikuwime.pdfIn PDF document text
    • https://clubon.top/uploads/files/99783791184.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/60429166369.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/pexewonanepefufiladujal.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/leraxenokegopeweza.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/fibovasewekoratepuvevum.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/52809872396.pdfIn PDF document text
    • http://metallpress.info/files/53988506715.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/88268551005.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/33aacef48d09c78030ee7d6a28ce2a62/87381224642.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/sivakigivekafaneduxos.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/51103309287.pdfIn PDF document text
    • http://orderkai.com/uploads/files/25123109878.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/xiginoni.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_off0000c29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29C 17004 bytes
SHA-256: 078a2ccaf8c1f702bbeb5825c24cdefff127f7a63f7bf450b9160ed2c3ae4ee6
font_01_sfnt_off0000eda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BB 11500 bytes
SHA-256: 55f6bfb202198ba794f46c24f15bb6e1d10a27828643e84c7d93a79597ce0195

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