Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b760fdc653523ed…

MALICIOUS

PDF

79.0 KB Created: 2021-07-02 08:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f2741e97d67fca3ff8c574b6c17076c5 SHA-1: cad35949bb94bdc27b0ec0d4fc6360ffe41158a0 SHA-256: 5b760fdc653523ed806e290a3f7cf691401c8e469dc0421017b61b80139f3d61
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to external websites, some of which are hosted on compromised WordPress installations, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The embedded URLs and the nature of the heuristics indicate that the primary goal is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2623

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://ketchas.ru/uplcv?utm_term=win+10+iso+1909+download PDF link annotation
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070e761b68f0---kukilipaletovit.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/25647134840.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/r5b9fafg677ed3gfpggirl6tf2/35127107133.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/77878977597.pdfIn PDF document text
    • http://planetamama.ru/files/file/1233354423.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/r15buq9uqf6hh306vn167bp9fu/zewagasepabokuvaguwoloku.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1984cce8---lojakukixupurufemilosefok.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/34263775119.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/gigibowakiw.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/2034016c0e9479702813fcdd7b8f0eb0/xamimofavusulepuza.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858f5339e64---ziremubizivenu.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bf59001dc---muxinolekagizobakogafodo.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/23a0c501e6f1e842659224e7357689a7/kiwefev.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/razimusod.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/vosulevewijivot.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/62f0250fb115475ecc95f2b52ba1dff5/54891722007.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/482f9e99c51e66209afa0e7bf7d2be6b/rajotupuside.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a7cd36f0133b96bfe8c6fb611fadce6d/79910917154.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/b546fd64a8a9b7b57f3702ab8416a92e/sonizufukezapexuv.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/kigemivilutubolunugezoko.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607559c426129---91736226630.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771e9f9d1df---mejaditelemarugijiratewur.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d08fea62e8---52647998788.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/r609et88t397sjcsg37l0btfs3/tezenuxozazudod.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/11c9945aaecd59f860de7730d7e95183/notobirof.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/f30e6faf89a2723e919e55f5feeee57e/10302794924.pdfIn PDF document text
    • 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_off0000ec24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10436 19212 bytes
SHA-256: 50723541294f22319cdff58604181177ff8708cf121bf3929f4b90c449180b98

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