Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e048a21cd51593c…

MALICIOUS

PDF

79.3 KB Created: 2021-09-03 01:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 974ff78bcb7e95ad9f487044620fec4a SHA-1: 909bbe6aa0263a368fed938c27600f7257461272 SHA-256: 7e048a21cd51593c982ba25f6ea87c4e8e70ae70ba88f45eec02ef2eb0980569
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress uploads and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://huntic.ru/uplcv?utm_term=casio+edifice+5123+manual+espa%C3%B1ol PDF link annotation
    • http://septumdent.com/img/userfiles/files/4970223909.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b917d1007f---26477377259.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/vivete.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/desoka.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/14956956022.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/mulutu.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f83e15aa8---gatobedogizedepurusixegas.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/r0mq6rcb77s1jshuuk7gdrbash/23952546234.pdfIn PDF document text
    • https://promise-land.com/upload/file/40480266159.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099aa7053773---96506580409.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/5t29mcvr35j0e8kd9idh73jod5/rajuzebini.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/livovibimomunufelifufuji.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/kogiluwupuso.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/37f9b2556fe2353e6ffaf1376d004e1c/90436453909.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/kemepimetizedaj.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f2ada8672---xipopijopepepatulujutir.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/fafaxokaziwebapazopap.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/be9ff224b8581773a9452e3ef1cf1621/61759452334.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/69405289754.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/28054630797.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16104b5ddeab9f---36975449.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/divelanixiratuk.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/potimozadax.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16270076927417.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://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_off0000cc09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41B 18708 bytes
SHA-256: f67ccc62bf92dc28744580e3963999861fe709e5ada90f8a56255eb64744907f
font_02_sfnt_off000114c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C2 11396 bytes
SHA-256: d0516b3ffbbe424c1fd0a833e7e3a57ca5ea158ad947f4aa21f97413b12601bb

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