Malicious PDF — malware analysis report

Static analysis result for SHA-256 3262daef3149f43c…

MALICIOUS

PDF

76.2 KB Created: 2021-08-14 10:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: f4172cb3e844ad13777f7f77980f96f5 SHA-1: 5b12ee664d41481aa5374af970a10b0edeed94cc SHA-256: 3262daef3149f43c545aabe6990abda584319f2ebc294d07a7b2ae01f886fe56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload directories. These links likely serve as lures for phishing or to distribute further malware. The document body was unreadable, but the heuristic findings strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

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 http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cc8e0947f---dasekoguje.pdf In PDF document text
    • http://aliceinformaticasrl.com/user/pages/91345456364.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/a8aebb0be00e77041947fe692697f0bc/36299391210.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/91344588496.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/5826483473b858d1a0a934339f4f0ead/voporavamefuj.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/zilapemo.pdfIn PDF document text
    • http://chapelguild.com/images/usr/nejufomobedagezu.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/90052146619.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/50018885278.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/waxonazare.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/55453693400.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/38e775565db46d01f4e0bf5fbfa423ae/mexakunofu.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/10399516231.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be13190e93---nivomibogurokobasavawawoj.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/migizedediboduzasame.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/miwugutupapedasetibajan.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160833d355a2bc---96354931822.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33205269202.pdfIn PDF document text
    • https://mfdesign.hu/files/file/tukomunibason.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/637e55f7c28954ecf2480ab863e611fd/16005235273.pdfIn PDF document text
    • http://hrudolf.com/userfiles/46528169651.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/zurekodefepedufukexusimo.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/gigefasexobofuvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+download+unmasked+aadhar+cardPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCD 10812 bytes
SHA-256: 0550435c0fecfaa3d9eddbdec3002a8ef22f42ade199ab7ec03017e8eb724e3c
font_01_sfnt_off0001069b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069B 18032 bytes
SHA-256: 7ad57254a23771ab526a15187c467d26d0d3d9851356a4f37216d1b7f93bd23d

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