Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e86cc65cea5c17…

MALICIOUS

PDF

87.6 KB Created: 2021-08-10 06:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d1b1b36d3135809115dfc9152cc6c1a7 SHA-1: aa5f61945d87c098f24c07b0bb3314ef9973074f SHA-256: 19e86cc65cea5c17be3e27a583e8b905a602551473b1c7237f7aa421631376b4
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 to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests the primary goal is to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/aqmp7k6uo2f9jiifdp8k247364/96250631616.pdf In PDF document text
    • http://wawa757.com/uploads/files/mexafipuxo.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/27344721333.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/gf1dt28njk295t63c5n1to1fh6/zowavixu.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/41114964151.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100790b90cd6---vakasogezupivegege.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/38829267106.pdfIn PDF document text
    • http://varanini.pl/userfiles/file/xafosodosedemamekaj.pdfIn PDF document text
    • https://keluargamimpi.com/contents//files/73609207656.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b83ee6fd8---67011061943.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/0ct31e7g0p1jvehpapbmcbpck7/toxupa.pdfIn PDF document text
    • http://simpelms.nl/userfiles//files/lepumezamokujirapinotiko.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/54795189622.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/9546c33cda7520be70b63a6c6e41fdca/taxoroxavakewolapabibev.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a304a0b3de---zepoku.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/922egalfl7nvuuv2k1brmqmeh6/lafavijoguzuw.pdfIn PDF document text
    • http://blueyee.com/upload/file/141046245882.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/gorapakoluxifugobumi.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a7512f698---46900077130.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/jg7m6u21bpqqm82ruk8iomm8p1/41684726163.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/32045231778.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c5db0ea6ad817e694cafa8985f14024b/73397785143.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210808181742.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/0e83cb6db13bbc132cc6028dfdf62b3b/fomij.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/l9bs20gm2snn0u2c7559kvs77m/33701390528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=problemas+resueltos+de+crecimiento+exponencialPDF 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_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10423 11016 bytes
SHA-256: 57023ef4f3ddcfff6565971bfea3c08853e1d7fed3b306e2ca6f1577f607d01c
font_02_sfnt_off00011d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D84 18856 bytes
SHA-256: e7ce28269a6ccc3628333bb8fdc2d84592d0bbb099d8e13e0fdf6da7de02f807