Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ad25625e9e5692…

MALICIOUS

PDF

101.5 KB Created: 2021-09-06 14:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b1617ad42ae5f935d6ad3f50c1e9710 SHA-1: 36335567b1f44b0dba1c77e6c4e4cdd316f80e2d SHA-256: 92ad25625e9e5692f7539ef1e7754e6b09394d1e9a836e6799b99059be116f09
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. This behavior is characteristic of phishing or malware distribution campaigns, aiming to lure users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6471

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://kqcme.yiaiwang.com.cn/upload/files/66538293265.pdf In PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff9c788ba3---volajujamabuvejizet.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/77542726222.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/gasokuraxonogenazibibir.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5a421b205---rujenazuliba.pdfIn PDF document text
    • https://isleo.com/i_photos/file/79056571702.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/guzawenifadore.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/jifikopezavolememig.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/fibj0176aoaogdc8m1hn0h1j6e/nepuxavegob.pdfIn PDF document text
    • http://hotstamping.pl/files/file/53356641140.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/sifomidonekedebora.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/24934807488.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/6990846115.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/75447359668.pdfIn PDF document text
    • https://cafe-malaysia.com/contents/file/rorumitulunujan.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/novuxi.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/d4cvluberq2snru9amkrnhtkv8/bozezup.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607686b7d67f8---sowepil.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611b61bbf0a8c---5641478064.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee220bad6ea---53880915482.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607939a2d862f---foluzozularurar.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/65452854366.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/5c89b7106fbbf6bde3cd58879cac5e05/90461885946.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/mositamisoli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=libro+speak+out+elementary+workbook+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_off000145f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F1 21220 bytes
SHA-256: d39b8407686ec71fba8a54ad66fd4a3d4cdf74c20a67cbd86ff37e196ff4a257
font_01_sfnt_off00017e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E20 11148 bytes
SHA-256: 524aaaf7e2ad2ed840968c2a2824b2bd7c9e52ec0dc9ae57d36434e0363dc7cf

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