Malicious PDF — malware analysis report

Static analysis result for SHA-256 d480def049238137…

MALICIOUS

PDF

86.5 KB Created: 2021-09-14 20:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9b47c8fecea98635364e9e7e2714cf20 SHA-1: c7aae84d3d95066c15ef09d503ef3ae44fe430ca SHA-256: d480def04923813718832e9ffa004bfcdb50b385a86f02b5928b02f1db229b07
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs pointing to external websites, with one heuristic identifying it as a link farm on disposable hosting. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://chcial.ru/uplcv?utm_term=2xl+supercross+hd PDF link annotation
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/bugoduwunakubejoze.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/55355984401.pdfIn PDF document text
    • https://vespaclubcagliari.com/userfiles/file/mafinazuzerorabejisejos.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/vuxegufubewupi.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210908154537.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1631555910.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/gopatidofopegetojetuj.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/fanonasigopator.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/wegulikuxosipewiwo.pdfIn PDF document text
    • http://nenorm.com/files/files/mekule.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/sarinovekizewis.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/99123553213.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137cf5d11b0b---vepowupuvexotovoxudu.pdfPDF link annotation
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/vowaxatenibuzurimolano.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/34280136325.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0073872ba---8368064301.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/faponomutukebaf.pdfIn PDF document text
    • http://newmob.it/userfiles/files/mipitatixif.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/gojopozuj.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/89434297811.pdfIn PDF document text
    • http://vhshf.de/File/guxuvab.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b15c9c3edd---jivovunakovir.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/15797148811.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_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 18424 bytes
SHA-256: 14e04a2d467aabf11ee0a554628440dbbe82dbcba79f0cfd3b0c0a13e396a636
font_01_sfnt_off00011cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D0 10380 bytes
SHA-256: 6c92e5aa676c18729d41c281b42ea8d4995a7c3fd292a56197acb984f0cabff5