Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5000d7bfe2a4ad…

MALICIOUS

PDF

141.0 KB Created: 2021-06-27 00:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ba5b241f15d6e836053841094d462a96 SHA-1: c2337e71f7608d01bd648efd2782e3d30f5ef75d SHA-256: 2e5000d7bfe2a4adbf299c2a62d019cc4132a506592a7b3fd8c8c755d77b6562
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous links pointing to compromised WordPress sites, identified as a link farm. These links likely serve as redirects to malicious content, as indicated by the ClamAV detection and ML classifier flagging this file as malicious. The presence of multiple compromised CMS upload links suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b20654dcd62---velizefuwulikaduzigibumi.pdf In PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4cf723fad---25334767504.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/gelosamenelarasowus.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/9ee8847edcf71dc3a2492bfb49e4da36/bamage.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/2cda198795288d8c9931a343534d5a60/13496918986.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/jubizumon.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa153a0243---86830523725.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a335df6c0c6---80634348746.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/11ceaaa05710ccf277c580a16d6baa43/35355526942.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/80403787129.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/9aee7d99264683ddd97f393accba44a5/lijewazarinasa.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/42732c0bfec3734b694a634d377a42ce/98524090528.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160be7427b59b0---11486519742.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/fajajafarebabewinumosab.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/a2a332b263c55ee54c388695b3620b82/rotof.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/62923675330.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d296bd08689---33319640586.pdfIn PDF document text
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/laruzigisimadofag.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/98664783478.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/e7322d98ae97055fa27815dccdf63673/13511856211.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/61141182986.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160917c7015034---batupomerejusopup.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8c0c7dfd6---44218483118.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=adjective+checker+inkPDF 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_off0001c536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C536 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD4D 10240 bytes
SHA-256: 7691a6050db3562d348609c916fddc3707c6028545de7d956c5eb8dac44bbdcf
font_02_sfnt_off0001f42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F42E 18456 bytes
SHA-256: df0e808db6dcc132282a3087a3eb2291a6af309adf100db7ba9c91301eda621c

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