Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4a3c2f3f95b42f…

MALICIOUS

PDF

81.1 KB Created: 2021-09-02 17:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 77ba4f849def28e961ce4899bf42cf0e SHA-1: 0fb9ad4b2d8cda14fc478fa739a9d5668ad57f71 SHA-256: 7a4a3c2f3f95b42fa6753b96e1dec461fa2c1a4b97dc961e4c110a85395d4e17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f92383303---63887610577.pdf In PDF document text
    • http://accronline.com/userfiles/file/kiwes.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/20501472414.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/favovojewuwo.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/4e211041bb72b22bd8c62a0f0d21798d/nizukobanolixape.pdfIn PDF document text
    • https://petek.biz/resimler/files/99754289316.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/628b0eb7aae50b31833a2610d5dfd875/jaluduvememofizijiduxi.pdfIn PDF document text
    • http://dentherapia.hu/files/file/bosusorolebanalor.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/kagowamadotilopejako.pdfIn PDF document text
    • http://tetedebois.it/admin/file/popekawadalozufuzu.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/mexezodesebat.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/4bed09e6b6fab49960a30fd6dc7296f2/46709425333.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/88377921365.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/kukinibore.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/45329469379.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/4844dfb339dff5d7afa3be5e7d47790f/65782778820.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2fd04ddb6---bufivaxaxalol.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/tiruwonawenajam.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/e82pv8q72dqhjm2lkvu05n90qh/9912025635.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/gesesusurosobowimevev.pdfIn PDF document text
    • https://numberonerevolution.it/file/78169461141.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/wupuxelenokuvexibujupedux.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cc3ebe95d---52543570378.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=white+westinghouse+self+cleaning+oven+manualPDF 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_off0000d73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 17700 bytes
SHA-256: 15f5e0370c520cda8ef7cfc2b7f2fa2a749ec5903dcc480f775230c59808af22
font_02_sfnt_off00011d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8E 10928 bytes
SHA-256: bc852a523c9a3ac4ee5bfc2ee32fa3e8107503c79b252bf968ab58363214acbe

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