Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eee6813eeb8c675…

MALICIOUS

PDF

84.6 KB Created: 2021-09-05 19:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7ca4f378d9f51b3ae68581f85b99d1ca SHA-1: 04ee57723ab3fd81430e18f76c7b4df20a32399d SHA-256: 0eee6813eeb8c675e06c6ce769e66697723738841c4f41d1ac79dfaa403db01b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These links are likely intended to lead victims to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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
  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=pre+travel+checklist+pdf PDF link annotation
    • http://reunionfamily.com/clients/6/6c/6c58f7de0247188f02debbcda007d80b/File/juzamu.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/djcgm22vpcvg3na7d8noi2pq94/73386730127.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/kixuzonaxujugasemafuvifen.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db8843bdd09---vepuxasetumerik.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/futomobaratofolimib.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/qm8n6q8brm024t7tmpb2dk39f8/82312543621.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/veravaruzo.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/74098117375.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/61803704989.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/9238152265.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/lawezenile.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f487999d2e---wofodotazoximexadoz.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210814_F80B39CF00E6FD9C.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/zugutorotuvaferiwaxix.pdfIn PDF document text
    • http://wernitznigg.at/files/ludizuleviduletifadenuzol.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/tafukavibolor.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123bd397eb27---99167000165.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/kh1nivdatrt85hin6pa5r45oj0/bujimitewogojid.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/f9ef01a2c4b815bab72614cefbfbd877/23154805084.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/12445219839.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210617232939.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/miregutuju.pdfIn PDF document text
    • https://shidoremicrosys.com/media/xolirurupozud.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af5e3f404df---81210068841.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://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_off0000e7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 17664 bytes
SHA-256: de40f57e4870e7015ad2ae5d4e0bfbb9f42a962fd735cca6d600295c3b831110
font_01_sfnt_off000115f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E10 10652 bytes
SHA-256: 967cf16ec8cc49ef0eb262eff46bffed92360cdf5108b1d8d0184c2651b3e7c9

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