Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a732d65846d439…

MALICIOUS

PDF

85.9 KB Created: 2021-09-06 14:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 22dd0ee57e9a34cfa8d1f3270543df11 SHA-1: 7287da3717d12a512a211e2a1176448507eeb52b SHA-256: 49a732d65846d439ed6ddde5d4238d45969065624002510212500abcfe0164d0
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised CMS upload directories, indicating a phishing or redirection attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The primary goal appears to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3904

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://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3bd6da9bc---2214428690.pdf In PDF document text
    • http://yaan121.com/uploads//files/202108131714384458.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/54427952717.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/tmj70380p1cm8ntr5mpefmtvo3/sinoxogajiwesajutijake.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e95a09253---zaburopejisegipe.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/31226846870.pdfIn PDF document text
    • http://kleiberit.ru/files/file/getedej.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084ad56d31ce---mokukuguzokifeb.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/7d9e473fb27997e69ee9fed3347e8201/dovobakujowelijuvobojoso.pdfIn PDF document text
    • http://dgjst.com/upfile/file/dibusel.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d6e9a95b90973f8b8d16470d87eceeb3/34312135989.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/e4duovp543li35ajk5hpse2a09/gitotadugokimepapogo.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac15cd7ca7a---xavukolulegezifunoko.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/mefewosesadu.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/21960567781.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/43e086f545ac6dee7915693ab2ece757/53147601743.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/78156316180.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f193252226---33717481245.pdfIn PDF document text
    • http://righetti1970.com/clients/872956/File/93279482050.pdfIn PDF document text
    • https://theurbanthinktank.com/files/2016257541.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/3d00e179be3e8edae88b7df4bc676240/turazumebafuloji.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb4facf631---nanemawudibokirusodunato.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/54949979744.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f042806a61---tafubopazodudi.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/07540e59de20b687563b9fede1408684/78004545805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=purusha+suktam+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B5 21964 bytes
SHA-256: 102a5e7c2cb3dd74cf62f26eaa0e30cec90c0645f0d5517ca346a5c984ac7e57
font_02_sfnt_off000128ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FF 10820 bytes
SHA-256: b9d00928d9144fced66a8743b8e3aaaa2ce84c11dca65a5b8ff763eb641658af
font_03_sfnt_off000141d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D7 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc

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