Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f08a1606501979a…

MALICIOUS

PDF

91.2 KB Created: 2021-08-14 09:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 2582571dd5e26a63e34498dbfe354734 SHA-1: 2b806d298c46b2a87586cdaa70347c1ba7d92ad6 SHA-256: 1f08a1606501979a605c0e167a1ba6289c6c3ec10dc216b0edd694309dc6d2cb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple distinct hosts, some of which are associated with compromised CMS uploads or disposable hosting. The primary purpose appears to be to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/55646472908.pdf In PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/ledijudatubewapabosolo.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/22384073542.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609aad6f775d3---lamupajijewodipew.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6846e550c8---31975053921.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a689479e85d73eade8ecdd7b77c1d17d/nepesuwirafiwi.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/16246844343.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/24884425465.pdfIn PDF document text
    • http://eastbrunswickliving.com/clients/77672/File/99719366487.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/e2bqlgepgfaei8ga8aed9u00nb/3408668940.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad2cdaae6f---58491699279.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/4f9c8b09417413f39a066c3672e7b57f/20707099367.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/luwojezasa.pdfIn PDF document text
    • https://impresa-valli.it/file/pufiberevuvut.pdfIn PDF document text
    • https://ever-progress.com/upload/files/dipifugelewopikozefepaf.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210628105351.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/rixomadofepodevajofuzinix.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106a5b687617---wineminejogawaledi.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/ed3a4uo3bkum2fkqrgq5253mvr/33512600160.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/192a0b4b27dbc9b6619c061dad00f426/fomav.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/89007001594.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/701695ddc0303edec93a94832479b05f/29253937556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=receita+de+pao+de+milho+terra+da+gentePDF link annotation
    • 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_off0000f842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 20768 bytes
SHA-256: b5fee8d909aebfed15b388b15227cd97574a82d3e6f1f3abb73b177c935d9ebc
font_01_sfnt_off00012b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B38 10836 bytes
SHA-256: 576b3499208158466fabf0486ebb5deef8c72fedfc1cc65ec1ef71ac73502c1e
font_02_sfnt_off000143c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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