Malicious PDF — malware analysis report

Static analysis result for SHA-256 584e27bf4d213139…

MALICIOUS

PDF

218.5 KB Created: 2021-07-01 17:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: eb52bf4356a9c21e1a56f771a9d69e4c SHA-1: e25b05d493a37889957de82e9e89752fd312ab31 SHA-256: 584e27bf4d213139fb532077e48401c35c816e01f5cd7b7aabd145fdee549edd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it is used to redirect users to phishing or malware distribution sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=cure+light+wounds+3.5 PDF link annotation
    • http://skolicka.eu/foto/images/file/8525984302.pdfIn PDF document text
    • http://specimport.by/files/files/bupar.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/86929280115.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/78724373223.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/2a7bd0e25758d392267ab7c5a5314431/pumulezanu.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/1s4q50p8abracvf6thk6s14a48/lulizanitolumaw.pdfIn PDF document text
    • http://yilip.net/userData/board/file/jejabiveguzisipuwovot.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210516094953.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba309c4c69c---jamogop.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a2c36f3eb05b2424e0f78cb38f19d387/jipepesopozixuw.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cb2ff0486---60610086465.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65db4815a2---saxosoban.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a429bf42765---89803060741.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/7ad0646ca5edfcc0d8dc44f69ffae5d3/lowoj.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/99a869ff0c770bbec446ea2880d01608/95382444618.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/9b42e10dcdc7c7078b71300d54baca28/detubebex.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16091749264170---49280860088.pdfIn PDF document text
    • https://buka.ru/sadm_files/92141706576.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ac4f0be5ebba7607611f39e8ef617941/pofixetedufofolozux.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/6veqdbdmm67i7tlateu8ioo31n/22318901884.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/aef723a70e408efe3d5497d0ab302c70/laziri.pdfIn PDF document text
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/24606407788.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_off0002fd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0003152b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3152B 17588 bytes
SHA-256: 3fc91bf556f69be93d2254a52d9d8c1e632033fb6cee899f7a0569309383cfd1
font_02_sfnt_off00034397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34397 10952 bytes
SHA-256: 8e2936670c9808d4fa14a0426dbca2bfa857f5adcb17c38ecdef9639eec62acf