Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46c55beba0f0942…

MALICIOUS

PDF

79.8 KB Created: 2021-09-15 23:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 96b1b2fa5c19279c8df3a62f3a08740a SHA-1: 869bee018a9e7509a6510f24ad90bae5b2971e41 SHA-256: e46c55beba0f0942b4bb8b4a2638353f64a9a58acef9c319e927712ce309ae91
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://imotrading.com/images/userfiles/48219801127.pdf In PDF document text
    • https://ginniglobal.com/uploads/file/9204047914.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/winubujizetumon.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/lezile.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/2109120004235891512ea7r8.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/65237788167.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/kuten.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/ligexoluxozaxuxo.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/88927785323.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/xewefotutamawo.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/fogezitaliguwotazag.pdfIn PDF document text
    • https://pindimana.in/uploads/file/88884675050.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac9bd9559a---wivedexotozaduvukobapu.pdfIn PDF document text
    • https://fuoriscena.eu/file/37779760936.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/xoribiwun.pdfIn PDF document text
    • https://ahha.az/userfiles/file/tejadavuwox.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210906_002548.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/67653085199.pdfIn PDF document text
    • http://sk4education.com/ckfinder/userfiles/files/ravoredowutobuzobipefef.pdfIn PDF document text
    • http://theponghop.com/upload/files/ramozofifetegibozovejeso.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/74989030957.pdfIn PDF document text
    • https://castel.ro/userfiles/file/26346073261.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/om0hnvj7u5v89ip95mno3p1366/bakuvufuran.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/tiluxozuf.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/57950835290.pdfIn PDF document text
    • https://guijek.com/userfiles/file/28369531883.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=talkback+is+offPDF link annotation
    • 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_off0000d6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FA 17240 bytes
SHA-256: 601920ec0485f8ff777a27e3a812cac190a9299a8417a6542f221366596aea58
font_01_sfnt_off00010317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10317 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2E 10092 bytes
SHA-256: e471f50cd8cb0b8b3a959764e0371b28d8d64a315dc813b43c327a958cf26baa