Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66c913c6847d1a9…

MALICIOUS

PDF

70.6 KB Created: 2021-09-03 11:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 967cfee5bd450fd945092218c55c95d1 SHA-1: 3e3a53bd4d1fa210db4ca8653ce532ac68482d06 SHA-256: d66c913c6847d1a94a28310efefdf0d138e2984a2af6ccbe8477290fe234d47b
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to domains that appear to be compromised or used for hosting malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links. The document's structure as a link farm suggests it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9156

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://nomylo.ru/uplcv?utm_term=shimano+rd+tx35+manual PDF link annotation
    • http://greenplanetnepal.com/userfiles/file/zapesunetafe.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/kigibejavikadosaxa.pdfIn PDF document text
    • http://kartplast.com/resimler/files/95795513415.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/672aed872b69137492bb5b3606ecc142/85157115943.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/5a6cef496ab7e56f750368693dd5daf8/73866519568.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/91998374846.pdfIn PDF document text
    • http://poorclarescork.ie/images/75002199960.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202105261602263004.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/metesopozumasoput.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/zoluv.pdfIn PDF document text
    • https://drishtinetcom.in/FCKeditor/file/tujado.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/67441100911.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/tuujd5pmi6mif22ftf4epko3ea/65168224327.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe517dbafc---memotinivunaruvu.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/91636098125.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/56525874073.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/39547526575.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/0c31d5eb969bfc54c04789e6e85ec86f/23314742099.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/vupudumag.pdfIn PDF document text
    • http://safarang.com/basefile/files/nowobajagibomo.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/xugidobuvanowuzuwiza.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160baae99d0fe4---79103085030.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e9da352e5---37576775271.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606d04c4ad956---2402114673.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f8a81fb22---17875756535.pdfIn PDF document text
    • 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_off0000e50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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