Malicious PDF — malware analysis report

Static analysis result for SHA-256 262def834b62540d…

MALICIOUS

PDF

70.5 KB Created: 2021-09-14 00:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fd90282b2a4fbfa4c57d1ea5ad08da7a SHA-1: 90e05c8e994e15064b996e791b69df30f769573c SHA-256: 262def834b62540d684e22122801c20e4fd64d10fe5a2326d34c8922033d6c39
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous external URLs that likely lead to phishing sites or further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=boruto+eng+sub+online PDF link annotation
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/s85cgomc8emunnl3hooo2kh6o5/muvuxijep.pdfIn PDF document text
    • https://doitoutdoorz.com/file/oL2FzXhxWnl7RxeX.pdfIn PDF document text
    • http://saimiri.name/upload/file/lorosufonavozuzefigewoli.pdfIn PDF document text
    • http://salonmysliwskirys.pl/userfiles/file/7343839478.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e586ed2ee---gedepesevasen.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1630877785.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/fuxazidofomumobagixe.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/rujim.pdfIn PDF document text
    • https://equalland.com/uploads/File/pebisis.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/mobifaf.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/16952202446.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/13676236522.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/78143478438.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/babalalodeji.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/donenopopubozije.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/fopopitir.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/87796720004.pdfIn PDF document text
    • https://kaparatt.com/images/File/84407128230.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/43301626184.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/bafeji.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/74987120275.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_off0000aec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC7 17388 bytes
SHA-256: d99d7eacccf44d1728d51cd0d95fd3b5b5e9158d4e851dbd4706e16ee5a92812
font_01_sfnt_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF419 10416 bytes
SHA-256: e8ca5278c82f92fbcc15be442b288a25c875457d106d6bc6d8d2419e7b738052

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