Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58bb2058b16dee3…

MALICIOUS

PDF

81.4 KB Created: 2021-06-10 18:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ab3ce771254098c57ae7f552cd4b3b78 SHA-1: 118c49bb124d9aef75423bf094260da061acbce8 SHA-256: b58bb2058b16dee31a2fc69e12d7201f6e2882d79bab945c256702608a39c3ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to a popular movie, likely intended to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/uplcv?utm_term=dragon+ball+super+broly+full+movie+2019+english+dub PDF link annotation
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/koduduzibegesinirejef.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/b5470ad3f7782ebc8118ca3c454409ca/6398472039.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b20e1ddb9dd---kagawulinuwaw.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e4e110057---likobisepukowivep.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/suxitebukifiwadodonix.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/9359abe7ffe95231f79d49e8027c57eb/90415881597.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/bewibabisagijaburilidot.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/fdssr4f5da89qurg5hrjlraj1s/50622802968.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/033981007357cdc4fdb71d8bf9805b0e/xunatukoliviruxuvajapol.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/sarus.pdfIn PDF document text
    • https://avvocatoboretti.it/file/49934040156.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/80516248471.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cba657aef3---nesoxevebu.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/82428918119.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 4668 bytes
SHA-256: 059764b21ab76dbe0645a016dfc3f7cd89f66dc730d8406e18374ca06266a750
font_01_sfnt_off0000ffb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB2 6236 bytes
SHA-256: 27ace8d0c8df7d3d5beab6d6b34192d382bc2304e9402672ccf46a85bbcb4aac
font_02_sfnt_off000114cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CF 10460 bytes
SHA-256: 3b0512ef1acbb56959f42251c7a932563e19c6f3dc0e1cab64bf7255a53f97fe

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