Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4c5ed45c5f62ee…

MALICIOUS

PDF

87.9 KB Created: 2021-08-07 13:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c432069af3a656d247a40b9707d5f9c5 SHA-1: 1076132e2e34c555ae945b43740aa63ad605f3f9 SHA-256: ce4c5ed45c5f62ee5e4d384400b91c7983333ed5d9b57d58adbdb8e5f0e0c5e7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of offering a password-protected archive download, likely to evade gateway security scans. The embedded URLs and link farm heuristics indicate a strong intent to redirect the user to malicious download sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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 https://allytemp.ru/uplcv?utm_term=gta+san+andreas+zip+file+download+for+windows+10+free PDF link annotation
    • https://horizontire.com/userfiles/file/2590510637.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/jc8qf23tv6a0gd6vbl452s3586/tuzutebiki.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087680a86f1b---71929540191.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072cb95ce3c0---zivaseboxifokuvotigete.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/modij4oig39103alm3durqlmg0/24963671670.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/3c960694790f90c3ae449131c899af28/gabokipusalonugakow.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/62280325540.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/nadaloziw.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/80039708248.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xokup.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3101cd981f092e50d305eb44af079183/77700172458.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/10810490163.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/kikofaxugez.pdfIn PDF document text
    • http://foodchemsino.com/d/files/wibinakekifapewetuzil.pdfIn PDF document text
    • http://short-story.ru/upload/file/97626644367.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/45792026090.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/0tfbllgc835qedd7d87blm3b7i/51702983657.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/56883223098.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/mawonito.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607be806b853f---7820661556.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/9ilojuajt1rjvg7h3fcpk8af7r/witupeni.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/9faht71noadlgb84qvd0j6t9ek/41160029366.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6c9da3254---kikarubukogukama.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/78625591126.pdfIn PDF document text
    • 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_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 16856 bytes
SHA-256: 34b48e3da1ccebdc4f05589ab70e4f2ac8d444981a25475d430eaa283bdde251
font_01_sfnt_off00011edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F4 10848 bytes
SHA-256: 4dbaeabff9773ef5abea083b61bc08c1481ab3d933e20efa68c2166acfcbf9de

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