Malicious PDF — malware analysis report

Static analysis result for SHA-256 788ef72d52781977…

MALICIOUS

PDF

86.7 KB Created: 2021-09-10 06:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7e4dec656fafe3325466559e710ca346 SHA-1: 5cfd8007570fed4f0a53c63fed89c33034c29dc3 SHA-256: 788ef72d527819779e2ba07828bba18c012809ea4b2f3f9cf527e00970946c11
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs that point to external sites, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=top+live+apk PDF link annotation
    • http://fullcolorspandoeken.nl/userfiles/file/bopufirar.pdfIn PDF document text
    • http://tion.hu/upload/file/mojizuledorututojimojaba.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/01/bilojedakabaledapexapof.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/45482616720.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/74601728555.pdfIn PDF document text
    • http://mywayrtk.org/userfiles/file/wofiramunalopuxinifemel.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/ruwerawasatowekular.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/5dcbaf3308e9d07ecdd27bc1fe07fb72/tiloxisavopofoboji.pdfIn PDF document text
    • http://szwygs.com/upload/rifalu.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/tumivimiwifoxog.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/zixos.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/35912890225.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/25198990919.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aafd25279c---30834081297.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/50682770053.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/25133414019.pdfIn PDF document text
    • https://apra.pl/files/file/68358632057.pdfIn PDF document text
    • http://mousike.it/img_ins/files/fonosuzagurafiwezofe.pdfIn PDF document text
    • http://kleiberit.ru/files/file/disuwomumezemisosuno.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/kotuvewob.pdfIn PDF document text
    • https://banghenails.com/upload/file/zipogavexosuluselav.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/80496831356.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_off0000efe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE6 9896 bytes
SHA-256: 5db9cc788157eeb591d3c9e3393a122b22d9db4abe10a4d94d70667e27040d07
font_01_sfnt_off000105d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D0 18264 bytes
SHA-256: d0077b16363814d0197265b82cefa282b61f8a6e1ff51badbdc4dcab689ef055
font_02_sfnt_off00013599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13599 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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