Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcf53125d6fee35…

MALICIOUS

PDF

72.1 KB Created: 2021-09-26 13:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1936039091f3bf001fef5a8478cf44e2 SHA-1: dd82249dbdaeb2b7f95619c49caa4793c8165478 SHA-256: abcf53125d6fee351b6ce94960b2783ac118157c3887248944e8925aad95e697
164 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript and external links suggest an attempt to redirect the user to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=pokemon+let%27s+go+pikachu+mod+apk+english+version PDF link annotation
    • https://kompaspt1.com/contents/files/kumez.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c022448a0---31184257532.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16133269fad450---faxitatov.pdfIn PDF document text
    • http://gibisch.biz/files/files/36339556450.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/sazerifewekexininemo.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/nexitoruxipemirifen.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/85486346488.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff72d97129---jagupegewik.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/14364016329.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/xisatufidipedu.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/31576830563.pdfIn PDF document text
    • https://esz.jp/img/editor/files/53747897027.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/baxele.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/gelidufoxekejabixivigujef.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/12558597345.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/59835623828.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/misebe.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/lenovot.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/kizoxu.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/romifetalum.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161450e65254e7---35094033773.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/teruj.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/gofixapawepina.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_off0000b26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB26F 17052 bytes
SHA-256: 581f1c474e941e411a5c3802a1b92a35b5e671a16ad267cf8459f631ffc323b7
font_01_sfnt_off0000de49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 11256 bytes
SHA-256: 8e0d79f4a5ed8a4849f563cefb7e91248f0e84c47cb6738a056b7b4a6dd56448

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