Malicious PDF — malware analysis report

Static analysis result for SHA-256 382a48c021733b63…

MALICIOUS

PDF

81.5 KB Created: 2021-06-14 03:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 563aa16311ad0c14b4fd745d089637e4 SHA-1: 299a5779923506ae906cce6f0495951503c1953d SHA-256: 382a48c021733b63f6052e408d5c57b93993ed2dd2ca532250442c41f2598de9
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of the 'utm_term' parameter in one URL indicates a potential tracking mechanism for malicious campaigns. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cructi.ru/uplcv?utm_term=female+character+gta+5 PDF link annotation
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/b809377ea001d2f66484b924a4fa6d07/gorefifudamewipavobafokam.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ttrnjko6b2pcmi9tksjlpr5747/xusazegagoleburesafebu.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/1953feeikp27agus8s0lbojg5e/zedapizigeg.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/bcd9b10c808296707f1607ebf08679ac/38633184453.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e292f0811d---keparukozufipugiwav.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/25742597181.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/47349a15711301c6f6d07895e751d727/57954639963.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/d36cfeab3cacc9b401ac93168e37a3ff/dijiketejemokoxezamivatod.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/qvisdr5qo68at1o6gl9ssr29g4/64781131659.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/81f20244ade0ad13a5e24703d7efeb0b/61467305459.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/12132907572.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/kigazodasaw.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a76b5275b---ruvagufakiteb.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/gosivis.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10332 5116 bytes
SHA-256: 01263edd3e6a0ca5c99272f93e8d09df59b8107f6f6131829d2d346b76e39870
font_01_sfnt_off0001146c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146C 11040 bytes
SHA-256: 13a086d8a792d34cda4ec348e930dff72e68afc308f01eb60d19296a1b54ab03

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