Malicious PDF — malware analysis report

Static analysis result for SHA-256 1474383563cd0edb…

MALICIOUS

PDF

70.8 KB Created: 2021-10-05 06:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 217078426693ab29a133b13e02352740 SHA-1: b27049c2607607822d7a15bd21bb2c53abbc16c9 SHA-256: 1474383563cd0edbcdfb1969b11186cb5ac623a1648a69c8473cf81cba554a7e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous links pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities to execute code or redirect users to malicious content. The presence of JavaScript actions and links to external resources points towards an attempt to download and execute further payloads or steal user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://nomylo.ru/uplcv?utm_term=warrior+cats+catmint PDF link annotation
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/50104611665.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/zigokul.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/82932394740.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3490023c3---65121878646.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/rivale.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/1695008297.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/d6nscgjr3tf63cukbif3j80f37/fesumuderizereze.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1614ebbf12773b---82289489352.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/92640892934.pdfIn PDF document text
    • http://mywayrtk.org/userfiles/file/32479193021.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/79473030878.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145a6b494e93---nuwiterewuwe.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/barulebusuzisewafewene.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/58996951117.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/34457999142.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/90829854314.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/7779548676.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/potugozixigosazugibaxag.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/rikasijenesokirolas.pdfIn PDF document text
    • https://rajakedua.com/contents/files/jeludaga.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f4574000bbb90d40dedf2aa4383c3eaf/42369367416.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/79600955794.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_off0000b6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE0 15920 bytes
SHA-256: 9b667e1c4b9639267fdcc04008bed4b03fefb23566fede458a1ca29b13c5a378
font_02_sfnt_off0000f71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71A 10208 bytes
SHA-256: 5007ad771259599376697f98419f5a12e829e8b8892a92334a8d90668f5df764

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