Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ce7b5d9fb25bed…

MALICIOUS

PDF

88.5 KB Created: 2021-07-04 19:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 14b76cc73ecd8cb2bae75d1bdcc3d958 SHA-1: 70589fbe95e805d95dbab919b45ceb48d9d21b19 SHA-256: 42ce7b5d9fb25bed2477f6da02375db95ea608522722f39dd0514aad0cee6963
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of multiple links on disposable or compromised hosting suggests an attempt to evade detection and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076617e55f8f---xomelotulififupafuwajalov.pdf In PDF document text
    • https://vasantviharproperties.com/userfiles/file/40305103057.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608e08c4159f8---nutubuxopon.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/lizuka.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/54fc8d961853dfff5e324ec914d3250f/65447936792.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16075cae09bc72---xotokivi.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/sovusokivafuzazixezoz.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/te9n2h9hsi9ggmecgrder97c83/rixubowox.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710f989e7d7---xuwujezuxitulitiruvubap.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8de7250b0---tiliwa.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/20433018002.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/zagapurobepamulizix.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/81532418344.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/iak1egpo6ce713u6jjvlnhj6rn/86686279679.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed67ba543b---45902006062.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607070fac55e3---90165718654.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/8146828929.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/23356296083.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/38fa6e60b88b382eb55d198cbfec08cb/lerewure.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/tuguxaf.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/0e55add6ec4d28d41c4d9012b2918887/2390806891.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=x+men+3+the+last+standPDF 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_off0000f894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 17384 bytes
SHA-256: 7045344bf08f1fc43d73c2aa568bcfaaef115e72ba107f40e8cebd017097cfe2
font_01_sfnt_off000125d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE9 10380 bytes
SHA-256: b096eeb594f8807ea8abe691fb56b4c6f4e969705f35c7b4e348e4a219ae43a3

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