Malicious PDF — malware analysis report

Static analysis result for SHA-256 111af6e1058ed342…

MALICIOUS

PDF

81.3 KB Created: 2021-09-02 18:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0977d3db96fc2e78386d97cbf9a224f3 SHA-1: 1f7b5022680a9d7509990b3cff047a7c54b5ed15 SHA-256: 111af6e1058ed3428586e49fb21681d0badb75d222dc72090137ffc024bfec35
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs hosted on potentially compromised or disposable domains, suggesting a phishing or SEO manipulation scheme. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://shukokai-voves.fr/userfiles/file/99303924405.pdf In PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e61a317b9c---78039825203.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/d519d3d6cc98b4e82796ace9de16b103/puperipasugixetemevepesa.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c9fb35071---tusabejidogutijomibu.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/74696079441.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/25dsd8puuo9rfp45ksgurle2jb/40114207463.pdfIn PDF document text
    • https://rosycaffe.com/file/844032886.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog//file/dakomofibovowiroz.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/ede742378a8f1443a34cf83d81aa2d7c/xipuramanel.pdfIn PDF document text
    • https://www.micd.edu.np/ckfinder/userfiles/files/95062909975.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/ditepa.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/1112155ae38f6f28555b1db93cdd65b5/42915055837.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/60707189811.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/51067623485.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/nadunamumumimufuf.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/13799708233.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/hkng850oonqnf1g5ea248l0hm5/88066522940.pdfIn PDF document text
    • https://ip-pharma.net/data/files/37000324318.pdfIn PDF document text
    • http://www.heksan.com.pl/file/nufusame.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611ac2584ae2b---23292833293.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/kerotumolu.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/1c518552058370fbf18e7ff5ff2afba7/18608729297.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/rigazewugakezon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=phd+thesis+in+educational+psychology+pdfPDF 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_off0000db08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31F 11012 bytes
SHA-256: 18023b8b52bcc59fc177ff13bd2d2f42fa392a84c56844084ca69404ad468456
font_02_sfnt_off00010c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7C 16800 bytes
SHA-256: 25fc74a3987c907968241ddd7d0a23b026a7db912c8aa940b36a7d0f368d7fdf

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