Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e7c947a991f381…

MALICIOUS

PDF

78.7 KB Created: 2021-06-17 01:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 282190c1752e0142a2b102f8c3420d66 SHA-1: 41d8ee117ba36095621159bdbbd8bdbd017608cf SHA-256: 72e7c947a991f38111d41f8e11d6d57a01b9357e2341a8c8a7f739f11086785c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF's structure strongly suggest it's used as a lure, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pixomot.ru/uplcv?utm_term=death+be+not+proud+poem+pdf PDF link annotation
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/4ciq2plk7af5e23ndav3mshibu/24255752464.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/27040311394.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/kn9kk86oa43jnon1olkt8p4jps/23590201395.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/43760782263.pdfIn PDF document text
    • https://advik.net/userfiles/file/papawafafodave.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160790c52c7de5---135035458.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/lc7a8jhaacgv16mjeb2psacv3h/96396096881.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/gakivisivujog.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/turadapajalopibisar.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/6766f59792a453937beaea493d5efc5c/32823016299.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/a53c37d25f5a8376bb27b744139d2492/nejowene.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16081abeb2fdf3---zugubegiwivagesu.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/lonumetilanuxidemirere.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/suzilamobawixeboturowi.pdfIn PDF document text
    • http://uamarkets.com/images/file/sozaburufotamuge.pdfIn PDF document text
    • https://actorconseil.com/files/file/34145944369.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f05ecfeb6---romirereseriburutunajeba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF763 5212 bytes
SHA-256: 1cd2e8ee7f4cd12e1769ef62713d12c48b29d0761fd992e01d85df7c1f8bda52
font_01_sfnt_off000108ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EF 10920 bytes
SHA-256: 962288e94ce1e29986eb32013d6e6b46295ed925ee48140978e8cbad975232b8