Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ccc0754882e5e5d…

MALICIOUS

PDF

87.1 KB Created: 2021-09-07 01:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f186bd97f5a849053efffe75b975faf5 SHA-1: 599ab23ec75d1fe717903208a962be4005dbb3f0 SHA-256: 3ccc0754882e5e5d4ac664eb03c0e8d98950d6042c545a05cf3f1cb85f9b06e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains or compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure that attempts to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://queure.ru/uplcv?utm_term=property+sale+agreement+template+pdf PDF link annotation
    • http://detikakdeti.ru/img/file/gadekinuj.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/d06vhu5lu0828scmsemcfmijnv/26170979871.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/691ee6ef486fc38277cd728271206195/23887125551.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/a1gdss85e5cd16iruc4tsopmpa/relumujajixor.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/94846959610.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfdabddc06---gilikuverukobuxarudade.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/buluredasug.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/13238884824.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210720065624.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/37353484027.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/92531395058.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cf4e72010---93972294974.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/mogifiroxuxami.pdfIn PDF document text
    • http://gzlmjx.com/data/home/bxu2343160066/htdocs/uploadfile/files/xinegenobexefof.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/78f8625l18f2691rmj4oc5j9km/39985046914.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797a247b1fc---lawinadi.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/54205310755.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16088cd6a4fcfd---72792814271.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703b14d1cd3---73161804026.pdfIn PDF document text
    • http://jerilyndavisrobison.com/clients/870655/File/45581228542.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/13202e46f51e7310725282288095d03b/jimaripeborugelujozimigi.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16109694fd239b---zetufunobawevik.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_off0000ed90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED90 10864 bytes
SHA-256: fbca28b1c0c649977320107c015c20b2d64b65c07481b788c1692b76187d0d19
font_01_sfnt_off0001067e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067E 18788 bytes
SHA-256: e677f2e528b4fa8f9b559b22ade58228e53f642973ef05cfa9a688977c103abc
font_02_sfnt_off00013681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13681 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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