Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c6dc60cdbded94…

MALICIOUS

PDF

82.9 KB Created: 2021-06-08 12:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 63489f223154b2d1ff8b90530d6cb101 SHA-1: 5e64b399f86507f6e9a22e280c0c910736b902f6 SHA-256: 30c6dc60cdbded9416ca8168525d5463bcf2794fd7b9aff0ce7537d3aa3fb826
156 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 high likelihood of malicious intent. It functions as a link farm, directing users to various URLs, some of which are hosted on compromised CMS uploads, to download software. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ketchas.ru/uplcv?utm_term=spaceflight+simulator+1.4+06+full+apk PDF link annotation
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/daefd6a420c79ddbce1a4159fc7d0ba0/7089958070.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/61144450235.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/pabolupuzopepokifig.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085725d2f7a7---pokuguwesanorezebexuz.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/56ab1277e7895a2847215f6180f597d5/zetizozotemenetefep.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b6c2d1227---lojamulibun.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad75c6ca822---dosisaka.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078863640f37---87293687876.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/moxedaxinozi.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/sidazurefegikez.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/14b1ed4b25b1df017d228953aea3e8f7/kowubeworikejuvu.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822d997f043---tufevokopi.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/r55gbnss8bgdjl9eqkjj99dkg0/kalifutizijel.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/ziganojos.pdfIn PDF document text
    • https://bloomeng.com/uploads/mojutodilamozex.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5e7ad420b---tabobalaxamuxotupi.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/rr5d0k6rebsgntmgpnf0i8nob2/32992791745.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/e39140370e17998533d6231103ed90ef/46302169112.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/448846b9b0dffeb5ea67d9a8e4d53695/2429564170.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD860 4128 bytes
SHA-256: 75e9659457767056b99d257fb345f3fd0bb12a40ba3f5f87f5cde08f368a456e
font_01_sfnt_off0000e713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE713 6064 bytes
SHA-256: fb1e151fbd9b1715a47b8493725bc538f9f0728325429762bf12f1356fa202fd
font_02_sfnt_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 15364 bytes
SHA-256: 8c690d0291857f80dca53abd2c117691966acd53a077d493273b052de154e2ff
font_03_sfnt_off00012825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12825 16164 bytes
SHA-256: c74f5ebdf5ae860b9396a46e95842ff969d026bcd0e9ffc4857bca0804bea99c

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