Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9aa07122349ed97…

MALICIOUS

PDF

81.5 KB Created: 2021-06-10 10:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: cd5d1c4bc3478c93ff3e9c2b13b72a2a SHA-1: 64a5c796716431e9c8e02ca7304a2a75d13962e4 SHA-256: e9aa07122349ed97ed91e6241d9d9b1d0a9e754ad910bb9a612a1b367f5426f5
96 Risk Score

Malware Insights

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

This PDF document is designed as a lure, masquerading as a 'stop motion maker pro apk' download to trick users into visiting malicious websites. The document utilizes a link farm strategy, hosting numerous links on compromised WordPress sites, which are likely intended to redirect users to further malicious content or downloads. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://philabc.ru/uplcv?utm_term=stop+motion+maker+pro+apk PDF link annotation
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/dc26fa4eb123962aae4f27ac10f6d953/48549527729.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084241ed57c5---felunajupixudilo.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/23198294464.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/4497db3abd47ae00874d5bde04c8986b/49517672690.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a53d9de552---56061149180.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/pomitosenetu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/gj65egubbm8ufmeh6k4qk83ch3/ponigajaxuvujavidizuw.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10a54bc8a0---16778085895.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/sujogukigagizujesa.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/77240943987.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a2077a3fae4---35653414669.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/78325361830.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8347e64b4---93376675515.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/2141101256.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u5teijtr2ib5094teu70bpe7u5/lowovizig.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/36001100690.pdfIn PDF document text
    • https://tavio.ru/files/file/lofabasumepiz.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092091f3cd29---36780123442.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/xokaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000e8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 4920 bytes
SHA-256: 4cbec28f326be5b48459d9b924bb45077d72452b7812de80eec0f7761d5fc583
font_01_sfnt_off0000f9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A6 12048 bytes
SHA-256: 042a330e3f7a2aae4775d957aa0be6181df60eb9ef0e210c32bf47ff6158762a
font_02_sfnt_off0001216c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216C 16168 bytes
SHA-256: dcc437beaabc532c244cb2402c7e187dabb6fccd34af89cd9e2270a2a4498d3d