Malicious PDF — malware analysis report

Static analysis result for SHA-256 5587749956a66bbe…

MALICIOUS

PDF

85.9 KB Created: 2021-07-28 03:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 901f2c792584c4e899f0ad683635852c SHA-1: e9dcd99dbe9d6c3095e1dfe07eeacbef1ca5c0ac SHA-256: 5587749956a66bbe4875f9f42b80c35a5145cba734c844721029fddcd2cc4b41
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://beytarimcilik.com/admin/editor_resim/file/9850738738.pdf In PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af99da058e---36525169148.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/mofisekusubosewazumepi.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9c0c0df1d9526f891b76bc2972b5fd14/madoto.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/2c9c4c6b054e607dabc6bde5066f4628/61604034930.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/petakuxugimeko.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9184051ce---81551545168.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/71c91e3f8e535a6f5af3e907b9c89522/33962407074.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/mixuz.pdfIn PDF document text
    • http://canoeing.by/pics/files/33555706320.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/87225354749.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d7e56c983---75598275567.pdfPDF link annotation
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/0b5659d400a85979225ff88319f7f188/21908196653.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/gatofegojoz.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/73014841475.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/dogepegomadevadono.pdfIn PDF document text
    • https://marmarases.com/upload/ckfinder/files/1992633160.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/wizugoxabuditufoniv.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/11715505716.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/guwaxadabirixelug.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/23ec0e670d2316ecfb424523b8ec177e/vuganeviwofelix.pdfIn PDF document text
    • http://dakmet.pl/upload/zabetifemesi.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/87728432744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=limpieza+hep%C3%A1tica+y+de+la+ves%C3%ADcula+pdf+gratisPDF 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://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_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 17204 bytes
SHA-256: a13aae1cd7c3b75a472a6f071ffe62e8ce3dc855403ea7e0888933e659d8a04f
font_01_sfnt_off00011507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11507 11380 bytes
SHA-256: 0b80bd0cb5006526f9d0abc401b4dba49973c45146544f744aa7929c55790404
font_02_sfnt_off00012f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1