Malicious PDF — malware analysis report

Static analysis result for SHA-256 65da2722e1a52cdc…

MALICIOUS

PDF

71.5 KB Created: 2021-09-12 05:34:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e39de6aa59ec400d905a3c306ea4c0c6 SHA-1: 9210390636c2e7da81e5211ba76173189e0ffc26 SHA-256: 65da2722e1a52cdc39ecb89861574750ab270659dc5c7d0828cc4d982719db80
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which are part of a link farm hosted on compromised or disposable domains. These links are designed to trick users into downloading files, as indicated by the 'utm_term' parameter suggesting a lure for 'gta 5 for android download'. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=gta+5+for+android+download+full+game PDF link annotation
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/75345642959.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/xasiwodolaratezik.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/29144379309.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/gifepulet.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/rojitupazunevomemajeki.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/d259b0afe4772748e4757860c1e3783e/baxol.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/87870188144.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/61604585081.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/wususuja.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/7061000681.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/35051531632.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/gobotamaxezu.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/hddu1idode85i73she17se7op6/nezuna.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/95788115831.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/befoforaluf.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/zedepevovumu.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b30b62069b---badezixeworukuz.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021090513593173499.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/budupoduwogoseni.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131145564195---lidixa.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130b032e99aa---risufulonavilufopexip.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/xofanenazezuni.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/96926578174.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/pakus.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/10855805600.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_off0000b8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CE 15080 bytes
SHA-256: 24fb031cdbca666c7a2ae558b724c50ad3d90999eb0b1776ec1e9881761acce6
font_01_sfnt_off0000def5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF5 10888 bytes
SHA-256: 5e0ad227cf21ccf3d53eaabc8abf3575eceb1675ee8c44467eb28b70e9875f76
font_02_sfnt_off0000f810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF810 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.