Malicious PDF — malware analysis report

Static analysis result for SHA-256 af960b2e27d93743…

MALICIOUS

PDF

65.1 KB Created: 2021-09-03 21:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c8f306617d0bb1a94c3a6b40c75723f4 SHA-1: 715a5332f5f43b91abf94e00e919265ef14d6240 SHA-256: af960b2e27d93743c33a12c5ecaae131c08cf6f199c1c65bb75e6796abc2663f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6298

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://medvor.ru/uplcv?utm_term=convert+pdf+to+autocad+2010+free+online PDF link annotation
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9d50a51ed---dewiwowuxojetinewi.pdfIn PDF document text
    • http://master-br.ru/img/file/71054865535.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/widedebobanonenafipar.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/d0epfdmligjr4rta5v5vq30jv1/19988997601.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/808369cd4a611dbe3a29ee7c11a40317/7402260834.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/6h1melp1u6nc5cprt5lhcn9g4b/logebotunozovugaparugopiz.pdfIn PDF document text
    • https://tempatpasang.com/contents//files/xiduga.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160c6482c95ae6---borapifatuvorixilodad.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/buzopigapivibu.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/talor.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/kugewa.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/9df73ca6531a2842e65c207fd3030803/noparixexuro.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7afdc1e9f9---seduwedaxajokojakuf.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/c36f51a079f1a5057c7e2e338bd6f1f2/najuligobaboxoze.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/89290484447.pdfIn PDF document text
    • https://kultmotor.hu/images/files/34467433391.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/rojakef.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/43905097556.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/28970913177.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/lalcc44nsuq4l0nuvfn0tgpfgt/46126392110.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/wekatikebijoxena.pdfIn PDF document text
    • http://palami.by/images/file/jaxerijetasad.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_off0000b73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB73A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF51 10936 bytes
SHA-256: 7877f05a1baf6ef4c0c379e7f79a6e13e31ee675a1336ef926d33d768afd752a

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