Malicious PDF — malware analysis report

Static analysis result for SHA-256 416bbc65244183d9…

MALICIOUS

PDF

77.9 KB Created: 2021-05-17 10:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a749def8d3b6a407a3e38cdfe60cd790 SHA-1: 228bf55e03ff787137220b89562c936d845ebd7e SHA-256: 416bbc65244183d9856d9aa84e5c05ee65b59b63e444cde77505160064e7d0f6
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting it's used to distribute further malicious content. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9327

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://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f79a8364a---31259574671.pdf In PDF document text
    • https://isosklo.cz./uploads/titapekejuwufimovadugim.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a5fbe424c---bodixogemuvibuzumefud.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/f9a196e247568fed74afe2c35248ab18/zarirolunaba.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/dubozusofudidasago.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/3122d816164b966f4f6692c55a9b5d46/molunawawij.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/55a3082b83f56503a90238a478537b1f/bubuxetupuvojojajojipuda.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/14548331892.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/qut4059e6hd59ou3o6vbenhphg/lokujazovexirovarewoti.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/8721405724.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083c48bb16f7---62875922548.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/b618a3a6557142040a1df81869af951b/dokugujazexamek.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/dd0bde0e63029ec3bbf1eac1643d5dbf/zijazig.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/9559af88235b8c6b42bd795f4962d77f/wufupuvonemivapogewi.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/q4h2qjbb8hf57alg30b6knffjf/zimubopoxizur.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a19403cb20b---gikisubovibi.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160997a8c8ba79---49240007217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=l%2527+attrape+coeur+livre+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C4 5004 bytes
SHA-256: 6fcbc76b8e8732a33319e3a7fc98c6ea65f9f362dabf6478859103dd1e46886b
font_01_sfnt_off000103f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F0 13152 bytes
SHA-256: 6c8b45a715d3cfbdcae37ca363363b7e3efaa8e312ca55bbc30e7e22baa2e059

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