Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59b692e94a0ef6a…

MALICIOUS

PDF

80.0 KB Created: 2021-06-11 01:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b881c3244d6650162481e5251b0fadbd SHA-1: 4280a1324a2fae6a65be813c11349673d69d7419 SHA-256: e59b692e94a0ef6ad6af911d977dcf57607568de177cf33e1d7bb8f93085a8d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.8431

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/uplcv?utm_term=story+of+the+early+bird+catches+the+worm PDF link annotation
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810698609b4---getenoluladunaduxozila.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/xumukuzunam.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/84457375167.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e6d3b10e3---26116075766.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba20cb0bc68---remowejozusuvikafe.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/fkbu8fo5ct3k73od9md99gjav2/dipuxuvufa.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d5f632ead6557ca960f170624eb716f4/daxunovizeninoz.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/susuvozededutusu.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/92332767c3a1e14e5991f0e801dc2a39/vexijifojozibejezojixe.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ca6f317e8559a945da099f45bd972cb0/redopupovurizemo.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/80d640068091131dcc44d238ccba0846/dafibavofana.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c679c4863---kemuse.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/f126e61be97946171f9c7a61758c2b55/doduzezozunukesalevimuz.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baeb0bdfd98---85904746813.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3334892e2---kotikurebojel.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/21074803631.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/vupirukozimuse.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/rs23jr46f27p0uph8mra548b1b/3997472034.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 7988 bytes
SHA-256: 5a8ebdc3f443f76c3428eaab98c236a304e7cb84e5470972da2ebfcfc90c2f99
font_01_sfnt_off000103d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 5700 bytes
SHA-256: 264d40b1b95f6fc0acf75ad9a3934617926e5f67a4339b991ff924c0da085759
font_02_sfnt_off0001171d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171D 11708 bytes
SHA-256: 3e539748aaf9f7d938d9c78dbf6a7825c704a04687307bfab61ff6ecc02f0718

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