Malicious PDF — malware analysis report

Static analysis result for SHA-256 114d3928b45f855d…

MALICIOUS

PDF

78.1 KB Created: 2021-09-06 20:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 58d45071ea006778e16fd54626ce5852 SHA-1: b186a401a645fa39dbc3b1c5b466d2be37048610 SHA-256: 114d3928b45f855db6bc67ba49aa0b791d41893e8bb12ee2d56674ca9255b4eb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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://035620126.tw/upload/greenkitchen/files/36439724504.pdf In PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f9881d627---xozowosej.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ikv1s74u6rf5f2p5kue0tq11tg/sanepore.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/mebotazuv.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/9e29d848f4cfa12a7925d547c7a10032/89940250937.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/88499053317.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc116db62e---bunatigugo.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/49077586915.pdfIn PDF document text
    • http://cssh.es/img/file/90431393393.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/26340438880.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/0vaegrieu2qpd67826glqdknlr/48992953508.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/oo0v3i0fp4cl7ts4nf124mo758/zoxagodawojojenolenowituk.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/30357420021.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/14081472652.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607728438dc54---71656794315.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/57968090377.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/1328e87bc7fc1b9e53eac6f6c7ed180d/30315938895.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608042f7dd1c8---49889805842.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/77695266358.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093e13d55a96---40750496340.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/22539260275.pdfIn PDF document text
    • http://cissi.it/userfiles/files/joxejamojeminowome.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/tezot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=bank+holiday+in+gujarat+2019+pdfPDF 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_off0000ea6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 11428 bytes
SHA-256: 034daff370d7d8ec942c67af856e9902595c45efcee3b0e0355715f1ac01f670
font_01_sfnt_off00010531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10531 18600 bytes
SHA-256: 53c36eec9101de2c9aea3ea18e21581e38c2f6c679611969102e42677ffa5912

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