Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cfc2c56eb68c09…

MALICIOUS

PDF

95.5 KB Created: 2021-07-03 21:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6b03fddee23493a095b8e800fc889ab6 SHA-1: d273f18dc0d61a1c530709da7b2bf8e620170669 SHA-256: 09cfc2c56eb68c0957f52baa22396b333b26b88f5827f39270160803fdfcf3c3
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 is likely a phishing or malware distribution lure. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and the 'link farm' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8096

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://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/db81a6f3481463971c33e1f3fc05efda/kuvezikixavamiwu.pdf In PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/5fca80789d06472dcbf268868424ac81/99085335688.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/37080955347.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e168f395a9.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0859047001620101157.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/017ca5ba698420f7c79119c645af9c64/loxoratimuw.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/jovamutu.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b4b0afec9---9682902166.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/gl7itiefgfbfkvkg16pb0en3af/jotid.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/zodinobiwimidediz.pdfIn PDF document text
    • http://3q1p.com/upload/file/210702215657882751vhvjgumkrou5.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c1ce0bf67---60006002355.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/d4schqad95jgakcvmctf876emr/rujasimaparurapuwafom.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/89078061384c1e4507c02a89ba2fc260/deminubiranu.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1f2e58803---pimowobewu.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607946aad5c1b---pijap.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/97106522922.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/492625b6228c1938a49590195a356154/63097951054.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=text+drawings+to+copy+and+pastePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A3 25612 bytes
SHA-256: 9a1334a2830a1ce54798ea9c07226e349694f9697b417579ef0f7f1cb8a72483
font_01_sfnt_off00014de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000165fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165FA 17036 bytes
SHA-256: 1cbfc7ecf1fac0d95b1ba715dcd27fef48d65dba728f69630a1bf8febb778f50

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