Malicious PDF — malware analysis report

Static analysis result for SHA-256 3614a6e35293e018…

MALICIOUS

PDF

85.7 KB Created: 2021-07-02 16:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1e8edf45f9f21714695a97436388301c SHA-1: 92436d79acc4e196522e42d14e6d7b8c6bb81f6f SHA-256: 3614a6e35293e0185ee82881b1ebe96f25c0b9f76a97dc9adcbdbdee202b528e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, presenting numerous links that appear to be for software downloads, including a specific link for 'kinemaster pro'. The presence of multiple links on disposable hosting and compromised CMS upload storage suggests an attempt to distribute malicious files or redirect users to phishing sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nomylo.ru/uplcv?utm_term=download+kinemaster+pro+without+watermark+for+pc PDF link annotation
    • http://www.urbanwaterways.info/files/7049353145.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/45405175636.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/54381054253.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/9c57707b114c34f23712ca19d8e6058d/tabeji.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/dilizofatujozij.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/75b053c35378c5db94ff5375f48a4233/barovikikewosole.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/61531505163.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01309001be---9909970486.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/24002680203.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/eovspkfbbkjgh1jtjjdoocjroq/migiguwolejum.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a4b8ad570---kotananinujo.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/fd26f7750a09bbaa622514ffe1c92b1d/62921427480.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/d7669876b7ae0c98d8b9ec361c914d81/toruzupanewunudodo.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b00643c3c---26765858680.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/vofofavavukam.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/4951689442.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f85962295---ginivulimomemebologu.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609862bf14398---doberibuju.pdfIn PDF document text
    • http://short-story.ru/upload/file/1513468690.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/deluxi.pdfIn PDF document text
    • https://afayl.com/userfiles/file/zazaparo.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/19494403246.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/9d1a06d0a2059b903f6971d005805c9f/74009216222.pdfIn PDF document text
    • 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_off0000ebb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB0 16764 bytes
SHA-256: f37930f415a020ff8fef5e81b593d8086e44545fd9e56cd88457d351ae2e71e1
font_01_sfnt_off00011710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11710 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F27 11164 bytes
SHA-256: f22313b5fefa7dd462cbf5b1555f6cba67091dd89ff7dca934027504e8c47c7e