Malicious PDF — malware analysis report

Static analysis result for SHA-256 467362408dbd6d05…

MALICIOUS

PDF

63.8 KB Created: 2021-06-06 10:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c0f57464ca512fa9c2bb8f099d930b83 SHA-1: b4e6c42ad450af172e3e09f3a347c19e19241d7c SHA-256: 467362408dbd6d05a2bd55680ede524c25079e78784b58ecf2943e8cb18aee42
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous URLs and the PDF structure itself points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

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://ketchas.ru/uplcv?utm_term=samsung+tv+service+menu+no+remote PDF link annotation
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/3ea2a21fc301089fa6fc430e84c1bea6/57559836854.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e66fdb6f1---21774020502.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aafd56c7ba---woribugukebajiragaxal.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/6269c93f50e4b9392e9a55e1a52acedc/37127058958.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c63cbc86ec---52703569042.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/49229948407.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/152438a8183b8eff06247606bb0eae83/83548747009.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/xibowe.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/b6db125b075ca3d292833a9fe1894e16/gajijekeduwotiti.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/fd09786e31a72ccf8b9f1208efe47439/zulozagezuladodop.pdfIn PDF document text
    • http://ubest.ru/images/file/pinewilisokujutepa.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/71225748465.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/4415e01cd2be73fef754fdba2ce86ebf/13355106589.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/2461043031.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/17718267286.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f3f550be934e7fdf15a38214992ef9ea/54958527543.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 5248 bytes
SHA-256: 73f0b49c612b483e843798edcfdaa58adeff6ad02b9ce21968f4d0661c31b7e6

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