Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b3e979ea13d0e1…

MALICIOUS

PDF

69.6 KB Created: 2021-09-22 22:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cf5dd1bbdb75628d3825bda140aaec98 SHA-1: f95ea63f834c780d06c6337d706fc79e83b09226 SHA-256: e2b3e979ea13d0e1182bd7bfd8aca20340c7ae38413340f5511800c9b12f9f73
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of numerous links, including one pointing to a compromised CMS upload, suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://childprotectionindia.com/lexcyberia/userfiles/files/povigobogoduk.pdf In PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/72613417543.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/memawifurogedopulo.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/namasomux.pdfIn PDF document text
    • http://hzqzg.com/d/files/wipunitaxivezotap.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137da8fc0df1---62262356789.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/44913529049.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/83245703951.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xokeferosuzoze.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/xeperafokufaxujodelotu.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/81353595000.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/97102959338.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/47818816234.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/161312f65af29f---lugowaliwabunulaw.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/jetokosixevinoxi.pdfIn PDF document text
    • http://123flower.doweb.kr/upload/files/wafon.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/nofuderoluruvatuvori.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/55402603694.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/keguboxele.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/79279289323.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/refitixufukujejokukajilid.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/pdu8vsfgsfkhogiudqh402cvra/pobegomatateruwe.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/0dac88b79db213f9018a5f474cc7983e/jivadisedigisonunirigisu.pdfIn PDF document text
    • https://angem.fr/userfiles/file/4353639621.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+make+my+own+vpn+on+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000b34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB34C 14868 bytes
SHA-256: 0c863cfb2972a98480acf7b626329459835c6e013c0e67c78ed0b352de417086
font_01_sfnt_off0000d886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD886 10688 bytes
SHA-256: d982b1725d7f4a903d03255a4693f988f389188ca3972abd866254342b2e7d8b
font_02_sfnt_off0000f106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF106 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1