Malicious PDF — malware analysis report

Static analysis result for SHA-256 5127eaefd6b4b494…

MALICIOUS

PDF

94.2 KB Created: 2021-08-02 20:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 200b9d7184fb258b84b53e23767ae03b SHA-1: a49853d03b84f01cf6a6796610f7f375ada9261c SHA-256: 5127eaefd6b4b4940d696e14499d1eb6264273319c85590b3407523a9040652f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 malicious score 0.9348

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://candientushinko.com/images/file/mabulidewevido.pdf In PDF document text
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/vilope.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc59599bfe---77670934000.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075a281117ed---72444487497.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805231ef2f7---37596276108.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/bosuzemane.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160722ede6c9e8---beloledomemamiluvazateti.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68e5a171e9---24305662849.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/edfonmk8e0jo406ts1tkpog300/57859408866.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/40986807127.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/19061421697.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/81c4c9a6d0124e7594cf89c713a3b37c/41152463598.pdfIn PDF document text
    • http://dhf-china.com/d/files/4976726758.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607935aad74c1---50666867813.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb32c3e7d7---lezokuvexowu.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/96e66819bfd67368dd5b8471b9d125a6/remuvamepu.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fe7f323fd---38870227728.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/allhodqu97d19u5l7hccf7ellq/74629308211.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/5b1fe46e9bfded1722e1ba9d73d638cd/kosorijifizuka.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16100b91dd6d6d---21829182349.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/pokuwapu.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/80427398332.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/95032211637.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/rawexajexuf.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/60e9319ac51bdfec2ca6e7dcced382fe/90962039098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ingenuity+swing+manualPDF 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_off000113f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F8 21788 bytes
SHA-256: c1c4a0801d057026e3cc83e692f6422fe90f85516d0b708c4ae8ea4dd4a1c4c7
font_01_sfnt_off00014b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B32 10480 bytes
SHA-256: d3a677df37cd647a45cb710a8d97fbcc7e2986b0b5cabf69af0a502c13d912b0
font_02_sfnt_off00016315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16315 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1