Malicious PDF — malware analysis report

Static analysis result for SHA-256 489a4042196c709b…

MALICIOUS

PDF

80.2 KB Created: 2021-09-01 07:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a845bb041be3d57a18d503ac840ca20f SHA-1: f0de53c7dbbc939633d6274e387dadc35c3d2a0d SHA-256: 489a4042196c709bee7715fc4e93f5748d7d6e49188ab4d88265a9a1074f8e6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites and disposable domains. Heuristics indicate this is a link farm designed to redirect users, likely to phishing pages or to download further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://damiel.eu/userfiles/file/58017222786.pdf In PDF document text
    • http://iseveranscopy.com/upload/editor/file/94726061008.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/83294057995.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d3d5ba3c2---roxagix.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/e66a534f5585b99dfc9e769a0110fa32/jumilekidebirimajex.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16070c3f0c3fad---dilupelame.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4332c6deed---xovunebima.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/xodofivojisadoderovujo.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/vezivapusafikemipuzon.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73379119523.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/45953086402.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/15606057143.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/63984515453.pdfIn PDF document text
    • http://stylekd.ru/files/54164666464.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/64244401559.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/6b8f8dba679e4e8be08912742d9ff24e/fuwiwuborozatirazo.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/62465911424.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/nidufosolazugefo.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dcf68bf41---6496565660.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7bcc7d064---dumeratigopaxerozit.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/bobemarolatedamiwa.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b85e7d07afa---jexezuvarod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=words+starting+tPDF 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_off0000d4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DD 10240 bytes
SHA-256: e9fc0bef2a31c56580eacd92bdd03cc965896c2919db589ce1891b639a09603c
font_01_sfnt_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 19004 bytes
SHA-256: 08233fea8bbafbb3d87a56982b80c01e224d7205c260900b6edcf94e2667b844
font_02_sfnt_off00011b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.