Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2e8609efb15b2a…

MALICIOUS

PDF

76.5 KB Created: 2021-06-18 16:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ab83090494416429f11a23f872d99651 SHA-1: 42b5e7a035c77e93bf222ae5f0fb605a5164b3b9 SHA-256: 5b2e8609efb15b2a97f2b6d6f316429629e5b7a80de0dfa1360ac1b8c18180a2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to download other PDF files hosted on compromised WordPress sites, disguised as movie downloads. The presence of embedded URLs and the nature of the heuristics suggest an attempt to distribute further malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/9e2c1e6a1ce3259aab224e3662134d71/98547456144.pdf In PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/pezanixopitis.pdfIn PDF document text
    • http://dakmet.pl/upload/tigesipobupawaf.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/010daec641acc8aaf38964c944abd638/26862064779.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087992dd6bd1---15917364126.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/07540b1af54645ecc41faa13c3a33023/4588970195.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608434e9ab14c---87084068528.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/5lfuuhnent29e57dortdu1i9fa/13981627802.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075839134607---544024112.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df8335df65---tijepojenigigakexozejax.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/5035b40287184a9348d796de0fea28a2/20428785289.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/geluvidubex.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/vixananakubabodipere.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609820d9f3ae6---71776693325.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/waxonimibegifukunokesinu.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/fetukox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=poda+podi+tamil+movie+download+tamilrockersPDF link annotation
    • 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_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 5436 bytes
SHA-256: a406b554ca86ce4b30afb9a7df76410b1aa77eda55b37e9305cd5c0718ea85cd
font_01_sfnt_off0000fe36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE36 11212 bytes
SHA-256: d2c9a6dd768d86bf8b91b9db785747b82ade9ee4e587e938c96864920bc179a6