Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fec601a43e13e3e…

MALICIOUS

PDF

83.1 KB Created: 2021-07-18 02:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 50d1caa0b9100fa19743a9eae46c4db3 SHA-1: 22d3aefecdf0a9a38c05a2fec23c70d9de9d3845 SHA-256: 6fec601a43e13e3efcb10b79ab934ff325e748642025bc8ec1c3a5cf37112bd9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms. The PDF structure and embedded links suggest an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2835

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://kasystemofkarate.com/clients/861259/File/somogilamewif.pdf In PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/8c1e14722ec40cd967a95bf8540cd48b/31849478269.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/85773814205.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/5ad117961b4366218e7191b5a4b64b82/rilarizodogip.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b51137274---waxozakesagez.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a8f2ecbf---lunivivudojadakudamos.pdfIn PDF document text
    • http://armanetti.com/images/ruronaluwidivoxomuk.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad479c6b05---36996617154.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/73457091325.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/7052095833.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb79bdf7aa---56213752661.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1bc65240a---25268708579.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/belovo.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/3509677263.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/gh6o25uqe5do26ve7q9u96tds7/62002735072.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/buekuj55le7dv6v0afqktahnfl/wijiwuxafewipu.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/8989183958.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/85044318084.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092b1cb20237---49652069866.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/3l4av0irbuaggip0uo4etsjov7/99899011931.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/83873930481.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/tigasegebetixanekunireg.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/rivebezuwe.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/jepizotagil.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/15366622795.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/i73ju9fmtdfpf6qvrdlpckbs97/papaxawusigenopafuge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=contingent+sale+real+estatePDF link annotation
    • 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_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 17068 bytes
SHA-256: 99820736e11795e4796d0f12a68ebcaa6b140f4d17b6cfcfc1898cd7d37a71a1
font_02_sfnt_off000130a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A9 10312 bytes
SHA-256: fcb657cc589fa6efd00b01d6ba3fe521d1118bce47b77ee262fc7582af72f872