Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa5709e48397587…

MALICIOUS

PDF

73.0 KB Created: 2021-08-02 19:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8a83abdb579f72bd4c67ce8140604341 SHA-1: 52c6ef1d94fd9d8162ef2977fc948b04c21c564a SHA-256: 1fa5709e48397587e538f2a5296ef93b5d2c2d1d3de126e246776c331996b8bb
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 a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and compromised CMS upload links strongly supports its role in a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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 https://crysiq.ru/uplcv?utm_term=fotos+de+punto+de+cruz+para+imprimir PDF link annotation
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160862b933436c---dumidixizigafewonivine.pdfIn PDF document text
    • https://ancoraeducacion.com/images/nogejajivotazokekipanog.pdfIn PDF document text
    • http://reichspfarrer.sk/file/80741805747.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d7fb969b1d9---88626892979.pdfIn PDF document text
    • http://skupka54.ru/upload/m/kabefujusu.pdfIn PDF document text
    • https://studiorampinelli.com/file/27633759338.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098362fbb12c---89015626884.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072862346bf7---pijokusadubibijixuzawek.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8042b3fa2---82171565423.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/vofm9k7o4rcuuejunphbjr9r0i/9077469459.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/ac5f0f6d10d1d4aedd18a81e0f6bab72/jiwuxenejatidufovulijoz.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160efef23a7690---gakisinibonubugosorivi.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/86064929306.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/8707784596.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d80ef7c508685202c3c63033f4cd8ba1/935751717.pdfIn PDF document text
    • https://robertbah.si/files/file/32750087447.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210706_0241641DF0A9FE35.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/28908926211.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/jivupenigug.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/b54b80d2268f353664e4055f937a2b59/felozaxuj.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/80779ab6636e7bc5b9c0c754354aabf7/fakijukitapipot.pdfIn PDF document text
    • 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_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 17260 bytes
SHA-256: 7b9bd3d10a13f760e835ca634023df219b368b44ac426ecf8b315707e6746396
font_01_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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