Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e5dce24546609a…

MALICIOUS

PDF

88.9 KB Created: 2021-09-01 14:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 431086e47df586c398a1968be4199b42 SHA-1: 25d7615f67fa75a672e2e5d8e3e9ab3c196c1adf SHA-256: 46e5dce24546609a904994899ccde3ecd9f1cf7195e5222745ca49ee23d9a2fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous external URIs and link farms indicates a pattern of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1610901c1eedc9---4347424203.pdf In PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/770b2f395164b90167df9d7a6338d14a/27072211785.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/i3lqnc2321mdn7uv2892nsa541/65448879985.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/lekikijifitut.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/kixupulevesewuzeragaboj.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/16756011077.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/0s9dlmsrprg2gak4vhigrg97i5/fanag.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/zalusisigakofo.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/09cadf27609e08361cae14ec1ad03692/7602352229.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210428075742157.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/17043451508.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/24721f1f4409e1d59b65f6fb3db208a6/87908099446.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/17405153861.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/90259585163.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/wuvomerawapezavezi.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/gadewotawemo.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b5e95eaf4---sidigoke.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/49989097965.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/6pnff1lglh17akua071vmn84n5/kulijepeboko.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/96939754883.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609685b6e503a---bakesojobixojajatibonalu.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/74893778765.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/nazigojem.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/c7afc4c0cf2c7fdfd2e89c6a70465964/zofedadikirofu.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/luwuv.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/11632829976.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/13871494855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=glittering+generalities+fallacy+examplesPDF link annotation
    • 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_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001086b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086B 10960 bytes
SHA-256: 577948b2e56128417df6f23706c2c2553918fe185b968a3c33994cd56418bfdf
font_02_sfnt_off000121e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E0 19268 bytes
SHA-256: b1504db01dc3e7b7dadc6a46d451c29b6f07b516eec4bc3bd573f83ee74ed510

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