Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa6f204d4e332c3…

MALICIOUS

PDF

80.0 KB Created: 2021-09-01 20:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e0f55a71e7405a60932b9a63923a037b SHA-1: d9953c60b897c05b2804b6d0e7fbf2e0b892ca6b SHA-256: 9fa6f204d4e332c37d998c0636ce62d01fdc0dd7ea952c092b2e7b25d8b2a34f
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to various websites, some of which appear to be compromised CMS uploads, suggesting an attempt to distribute further malicious content. The presence of a 'Password-protected archive lure' heuristic indicates the document likely instructs the user to open a password-protected file, a common tactic to bypass security scanners.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://gandolfiarchitetti.com/userfiles/files/xuzelivagogivaj.pdf In PDF document text
    • http://goldstecq.com/userfiles/file/16430995679.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/4pabamb0poc6qjlgvuv99k15sv/riloje.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/wamaru.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/mobozubamifozilaloxupe.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/vaxer.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607add3490b5f---77547194685.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/lijupiz.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/10729071412.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/262j3j4ags9gtufnlt4pi1n7vn/bekikunemaviwakug.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210719_230327.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/57965776945.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100d581d8104---togiwuwufexabufopabugif.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/7fd5111fdad078d104ab717cade87b30/nodofexisebabamami.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/xuretuzofu.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/bnhc9trqg7s65h0fmfg8u1apk3/movubanomi.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1063cdd2074f21248ec514be644026af/komepejejepim.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/xuwefar.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/40286961868.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/giruvujiwikoruv.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/doxixepitadonagevep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=pervert+meaning+in+tagalogPDF 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_off0000d3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 17692 bytes
SHA-256: 610846926e2c2f82cd1c03dda7932c092207424157ae5c0314967bb3d06bddc3
font_02_sfnt_off00011a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A01 10352 bytes
SHA-256: 6ffe07a98b52147050cddb44f897b5cd5c31fd459402b2c49f1f691ac199eaeb

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