Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa79f723ed0bc70…

MALICIOUS

PDF

61.0 KB Created: 2021-09-02 13:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6e60f8ac31ad9ee2cffe1f4f01f12fae SHA-1: ed2a5b9304c41c4a49012d0ef067beafe2ec1f16 SHA-256: faa79f723ed0bc700090c2d45f16a2d4523a6a58f3ade13ecb93e4e794c4e18a
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability or serves as a phishing lure. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other potentially malicious domains. The primary purpose appears to be redirecting users to external resources, which could lead to credential harvesting or further malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7802

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
  • 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 http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a756fc13ddf---3071891407.pdf In PDF document text
    • https://godahoian.com/app/webroot/upload/files/kalaxamozulolexamemaze.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/jekorevuvagi.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cf43e13420c4e32f72c5042658303345/31435284924.pdfIn PDF document text
    • http://thewesternmist.com/userfiles/file/rexovikoleworamopinixi.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ag4smd8nm17af8i7opsb4g54mi/remeresuxokevali.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1626238169sarujofepuludet.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/tireravunudajesaduk.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/850b53a2139f7d2901149eebf1ae1329/rituko.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/24866794447.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/lotejobipulajupudikixam.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/c356affd2544b18714df0bd8aa5b2013/91522469970.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/golofomimapabowuribowixa.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/zawokidomel.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/goxoriruw.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/72877135467.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/9c0e9f5eda7df059c0dab6c15ce4328d/kazetanovupug.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///99663171393.pdfIn PDF document text
    • http://transfertrolley.cn/d/files/kafagogefev.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cec41b1a4---67931649474.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/a30392c6e3d8f98005cf9dd8c4b16682/81843311117.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/rigijelesilegutixipite.pdfIn PDF document text
    • http://zamgph.com/uploads/file/23161244495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=rsmssb+ldc+syllabus+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB477 16504 bytes
SHA-256: af1e54bf9e0b6583a8d936918750ae23aa7ad6dbee9e598113332c05ce88a66f
font_01_sfnt_off0000dd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD98 10536 bytes
SHA-256: 06c7f0932195067ece54079d643af434a4e49e9efd9f61b66446bb5dac175156

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