Malicious PDF — malware analysis report

Static analysis result for SHA-256 d453e3fdef3a898b…

MALICIOUS

PDF

94.1 KB Created: 2021-07-25 03:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8e211a7555365076beb69a6854370c1e SHA-1: 91106bf016cee9c744b01e5a1e847895997f211f SHA-256: d453e3fdef3a898b60caa1f7bb0bae9fc3dcf5742afe51d7002da0fbf68bcfda
164 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 phishing or trojan threat. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic further support a phishing or scamming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 http://beloezoloto.ru/userfiles/file/zitatufizilefafavesig.pdf In PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/xoninagurepiruzigego.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/14409007685.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/17101598772.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/c043bc107cb2ea5684406a4e720bb1c0/67641535082.pdfIn PDF document text
    • http://yejida.com/userfiles/file/16525304099.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7c02962d89083ff6669ad15098c86356/31719121148.pdfIn PDF document text
    • https://traicaygiasi.com/Images_upload/files/gojudifuxato.pdfIn PDF document text
    • http://evola.it/userfiles/files/norezanejovizipozukonuzo.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079003914c15---13607501267.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5cd018265---80396387436.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843a8c764d6---4271278940.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f09567e8983---jojuketuzizajimon.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/dsabu5n801chem6ltve816bc2a/87562646518.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/6028294839.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/88743221308.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822d28b5224---88821778495.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/2kebsii8mmu4psdb3n9a5qntmg/88609127802.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c51081e2a---38435506624.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/dd2a1f39c598721a22e306f5191ccde0/zadojuxivuz.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/fitadimobajar.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/f30g5s5ut0b89p67j14qmdfpd7/luvawumado.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b0f8989e614c88fc52152c0880231c40/53619935438.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/rujowepusivojigagezotizo.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/debamamikevegodojixav.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/bb08d656e527923fc313534dfdbcf966/50663316498.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=what+does+tax+topic+code+152+meanPDF 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_off00010c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1D 11032 bytes
SHA-256: b521af8d5cc4b7653829a8605d721bb2b84a855e3110c307fa27b18411c167f5
font_01_sfnt_off000125c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C9 16656 bytes
SHA-256: 41a44353c837c4c4b523c088aae78eb8d3db3bc21bb231aa18cefa8b85892897
font_02_sfnt_off00015109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15109 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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