Malicious PDF — malware analysis report

Static analysis result for SHA-256 8602fb752a7d3c4f…

MALICIOUS

PDF

99.8 KB Created: 2021-07-26 09:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2d0dfb4217dae080567e203e3e0102b0 SHA-1: 06ef94dabae9fd27511014c9e28abaa9d078591a SHA-256: 8602fb752a7d3c4f7c89f281e739321e95fbfc0875dd9e3aa8175fa0585642f9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or directing users to malicious content. The presence of external URIs and compromised CMS uploads strongly suggests an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5847

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/50a2de63d83713e75d9b6ab73cb26389/xekij.pdf In PDF document text
    • https://acryl-bg.com/userfiles/file/59690347048.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/fvc5qk512qnhov2bnvdkg1igcl/sexixiduguwijurex.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/vufajebobijeremifa.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/terokegesovebepexi.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/af396379eeb6258d8134db8cde82f2d3/tapusunevoxefuforeji.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/543669ebe3cce62610822107b1202d58/jomuwusazeboxujotisol.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/54959960120.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/823db65d14174213264fb35abe0f1e2c/bovagesedevakela.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/c9fc6f3185cc358aac5422a7340611a4/53347877235.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca4d1189aa0---rusenuvosexazuvitiver.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4053cb8905---73495710463.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/50827517699.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075f49cdfa87---84529154233.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b64d42b30c---jupegadonisaronaxegi.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db8f37e0ab7---22713465142.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160812da3f1d86---zudawevitotatuno.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/10723684193.pdfIn PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/nifof.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/33958845183.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/fonubemixebunidedelutip.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/11647358559.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/59312039210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=oxford+learner%27s+thesaurus+pdf+free+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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