Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5632cd2a616d72…

MALICIOUS

PDF

94.8 KB Created: 2021-07-27 13:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: be58c6a1674a7854ac3fee5260a627df SHA-1: 9371c4f9bc2c71e40a66f2cf866371ae98de53e6 SHA-256: 6c5632cd2a616d729a2d27f86b73326c6a3e4b175bc19094209c4d17f4ec6228
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous links to compromised websites, including WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/44690890635.pdf In PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/a22k2rofm3l46g9t4lnjc0h1d2/nigotetenamobosezomojefo.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/7fa3fjbed1pts71c8v577jlcrr/xamupofobonaw.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/36303509030.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/2fa004c6e833e6afa3585b70703fc3ac/loranodavizodanu.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/palijiwamivudixetokeg.pdfIn PDF document text
    • http://cymrozgreatdanes.com/clients/1/1a/1a407d8ccac5525c71aaafb6b4664123/File/65331126740.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c52be527878---sokonixusozadutez.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/kibarunelakapefawenozin.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/9b9f736855974ab6d0b5e24fe5814bc8/32007666514.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/lajipeguzoguziguzez.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/c9be417ffd8e8fa3ae765ed7a4c1da9e/luwevumuzupabufawafo.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/pinix.pdfIn PDF document text
    • http://atek-ent.com/upload/file/32607235291.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/jh0vocgnqril45jp2sblu36s7b/bubavejuleven.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/1051561866.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/kasekofakumebovawatete.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/kasevalutudagomonir.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/c4dd1af3c71078051cc0f01d717a205d/xadegoxamanudaba.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/32252784601.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68f1d80309---87439327368.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/27735739753.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/0mndddmkv5s524hh8s53fs1aqe/potetatafubutukefetajo.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed9ce799698---xezefunezopaxoxezokotuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=adding+integers+super+teacher+worksheets+answer+keyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off00010bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF1 11120 bytes
SHA-256: e42a867cd2e10bc5b6b180d93da7f4485e0925e52b2ccc81c8fbd7e107b201f1
font_01_sfnt_off000125c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C1 17864 bytes
SHA-256: 16acfd06edc653974ea2ae92562adbfbf2d20da15ac70731aa8c03414acde04d
font_02_sfnt_off000154ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1