Malicious PDF — malware analysis report

Static analysis result for SHA-256 561ee89aedb5129d…

MALICIOUS

PDF

86.7 KB Created: 2021-06-14 11:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f0459a3115c0c8e0a94f5895898df4e2 SHA-1: b34d4700ce9761645874b140deaa1642964d6314 SHA-256: 561ee89aedb5129d3f9ad2833ab9be4999373fc6b30eb3f33a2c146364e29d42
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to external websites, many of which are hosted on compromised WordPress installations, suggesting a phishing or malware distribution attempt. The presence of 'utm_term' parameters in some URLs indicates tracking for marketing or malicious campaigns. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8885

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://nomylo.ru/uplcv?utm_term=thoptv+apk+32.0+download+free PDF link annotation
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2761b473958f4365b07255ce1bad6f36/vesak.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160701c00e0996---xaxizosamulipubifebemiku.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/81g95l6eqvavl28h4hd3abi691/22393840237.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/397e8992e57593297f5d6cca640dbdca/38005947469.pdfIn PDF document text
    • http://mextro.de/upload/files/65470802249.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/9kf2qvjirrf0e98n4epo6ak3h6/junuxanor.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/11496966792.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d38000135---11650482699.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/4um0d7fcgloipojs502hnb0ddt/sesaduxivowuxomirol.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee36dc26a7---49494448420.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/fcd699fdb3a2333691814e267ed916e9/73187626770.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095133eb9164---72151594122.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83363a2ee---rumomuxonevigopa.pdfIn PDF document text
    • http://toicodonlyson.com/uploads/files/teforiwinavafopuvepez.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0e39bddb2---favajukalilimipidefa.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb2f09551c---25198145494.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabeef49456---62902355529.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097fe2fe344b---malusirikavomev.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084c1722a1a7---jodezajegonewapuwipalusen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED8 5588 bytes
SHA-256: df15a4a3206a1f3cc02470eab79c6548002c50d3156fbdcf60dea25c19af5b40
font_01_sfnt_off000131f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F7 11140 bytes
SHA-256: 2a5b45fa677fee59a6d0edb67e1f078605e2ecf8f1751a6d1ae217ff01734991

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