Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7bcf7a54f62dc2…

MALICIOUS

PDF

89.0 KB Created: 2021-07-01 17:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4093888e056b7fd640b0924cfdc076a6 SHA-1: 9652c15d5c164457332d9fc38ac44b8b25b20aa3 SHA-256: fd7bcf7a54f62dc291bcea10a4d9c907139a88c373948ee0863ce4035592bce1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kasargod.net/uploads/file/75877192216.pdf In PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/4488dc1f2d92d23e92ad8ecd6ae0ed73/xajadoxevukati.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/5b1b63ceec31d4464d54347b3ef2877e/73732202636.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/397a41841cbc9aab152cc73f313eac5f/39350292265.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/83590088844.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a35c0b2e195---65457387219.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608291d4bdf50---43355187199.pdfIn PDF document text
    • http://goldmustang.com/files/files/48814597480.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722be0cc5e6---pusotodewinugobifi.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/92e800cf522a76b2f35dd974c17d9a78/71654748873.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/4bd573c983cd0b70ecf175bdf569e770/badurepasazusuzalogerofev.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/21401525589.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/48544817042.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e26d0af03f---pekozo.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607deb6d3ce60---14246376879.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/2tv0k45rkko6v33p4es3srj4ao/70692660579.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3700e8ad03---guberej.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/94e0b209fa0f20226de91c9e0ea82761/49668400496.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/k7j4rr9e13grmmgp45ntie4pnt/pitikupola.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6ed8a4adef7a68f023c71d4b534b8671/7638358546.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6ad29ec9a---62330349697.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/pikedexojebivapifu.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/6d783b8e0552943c3189f0d9c7f6e4c3/zozigezumiwojedepugaren.pdfIn PDF document text
    • https://vestol.bg/files/file/dokerixotilusewus.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/89558106377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=infinite+shooting+galaxy+attackPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AF 30940 bytes
SHA-256: c372f354bce547f6a4afad6d8d49d8d5b7c6b02273047e0ae23409dc7951b9b8
font_01_sfnt_off00012410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12410 10776 bytes
SHA-256: 8ebc7d03cf6887c47017eafc8355622d25e5cf5c19a3cef5440eb1e2bc76eb45
font_02_sfnt_off00013ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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