Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c89e49214daf2b…

MALICIOUS

PDF

62.0 KB Created: 2021-08-19 13:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 34d8d3cdf63832fa01cecdd75799e7df SHA-1: 6e0a4b2ec7166d0a1c6997a4ae979d74182d5b0c SHA-256: 48c89e49214daf2bf99e498dc2205368776bbc63a4c69f23ef8a1457a874f579
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7400

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
  • 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
  • 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://philabc.ru/uplcv?utm_term=que+sintomas+tiene+un+infarto PDF link annotation
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/me031fqtkgog2iqr2j7jd9e8o1/xezogezefisaneresor.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/dovuxo.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/eb506c1acca381d34267d78d53e1a029/refuw.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/9q7h0p5gfnejaj5hhf4sanfs8n/sipalotirobe.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/56509767632.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/gewemusuxokamawogefu.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/dudola.pdfIn PDF document text
    • http://scan3dsaigon.com/upload/files/35619783398.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc3f9ae9cf---41323945233.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/92264025672.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/gofula.pdfIn PDF document text
    • http://print-resource.co.uk/ckfinder/userfiles/files/6223154041.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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