Malicious PDF — malware analysis report

Static analysis result for SHA-256 7618aa93a184f867…

MALICIOUS

PDF

74.9 KB Created: 2021-08-27 23:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dd868c654590cea17b1ef90d6602ca34 SHA-1: 66e6c525c9dfe06510e4f4ec7341b12537a67bd7 SHA-256: 7618aa93a184f8674d7e43ba4aef1ff28350f74da48da8d82323ca00f4679000
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution scheme. The primary attack pattern involves redirecting users to external sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=what+is+strategic+planning+pdf PDF link annotation
    • https://kodcomputers.ro/2664/uploads/30361433497.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/f155f566196c27a8289df567308f6062/44748945130.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/eefd645902856626a361a155b5596f3b/pujevadiwukiwukekij.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/81234616023.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b349dbdf4---lenukunogavotisexase.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/22755950737.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/jijixeladanabiwidibezuxu.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607282a17bd6c---10649389530.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/8da643a3fbd1682e98c3434ca38adfba/60137853477.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/83393609464.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/24080325632.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/42131651606.pdfIn PDF document text
    • http://3q1p.com/upload/file/210725033433896626zesygyfvaram.pdfIn PDF document text
    • https://trieurodata.ro/images/file/linetujabazuxu.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/zexeto.pdfIn PDF document text
    • http://sdes.in/uploads/41222614603.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/3441974482.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609585365a0f4---60386392201.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/lugav.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/kajogixojojugagajewo.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/vufulixamokino.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/f248695bff6793b21a40ca759c36f6f8/59838268332.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/dinamev.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/63919892069.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_off0000c2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EB 16580 bytes
SHA-256: 8365f5f39c662287d03fb966cb5f20a15ad47a40746394e6d3feb378f96a42d0
font_01_sfnt_off0000edfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 10772 bytes
SHA-256: f291de71bd16ba2ce25f640c7722b04253f48aaee015a2ef8de7ebdd13a3f03b

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