Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca33928f4b345d8…

MALICIOUS

PDF

80.6 KB Created: 2021-09-20 23:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 02261e9ec6d58fa5dffcf68530b5b78a SHA-1: f28974560393e270f58397969bbbbb54f9472196 SHA-256: eca33928f4b345d86cd2be8e234a58f4a1c0ac86313bbd61f262847848149860
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains an embedded JavaScript stream and a large number of external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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=fifty+shades+darker+full+movie+online+hotstar PDF link annotation
    • http://kastely-vacduka.hu/fileok/file/93088929277.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/073a6185d73774a6430c5bab62d64a5e/wibariwajofuwu.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/wevevegabomifumafi.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/16959915459.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/42260709412.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/vutigozidazobopali.pdfIn PDF document text
    • http://dinhviht.com/images/newtech/files/75553946804.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/mojofalewifef.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/c4c6d63e8abf946c3d868754cf2f435c/46465641737.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/wenoji.pdfIn PDF document text
    • https://carlojans.com/cms/file/dolewumotetimugu.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/xukuwirabavenazufob.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/vikasogovejun.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/nixodinonupovajakuvofuvir.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/fukokumi.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/70632035102.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/bovegofujufavuvowibasib.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/25542956956.pdfIn PDF document text
    • http://teakdeck.pl/files/file/937323653.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70895846217.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/sixulesojos.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/62847644164.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/fikevekifeposoba.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_off0000d4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F4 10968 bytes
SHA-256: 4c7c61dade48b8d3e547244fe8631fc0e684f4f019f728f0a2c39779c40fa674
font_01_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 17688 bytes
SHA-256: e11d914fa72b6959e023d4924d1918d28c43e68c4258bad3709f121535a41ab5
font_02_sfnt_off00011c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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