Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e92b744567c0213…

MALICIOUS

PDF

107.8 KB Created: 2021-07-20 10:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 75a3c3e43d63d600d6392771f9879991 SHA-1: f4b3353b3e65f710224f3c56448f614ce607232b SHA-256: 0e92b744567c0213705e6331e58b21adeadd5ccc083a2b6634f6cd9a7dc78b49
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The heuristics indicate the PDF functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The primary goal appears to be to distribute malicious content or phish for information through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/90fb870c9de31533c9fbf383a0e4e5e3/pizujekuwo.pdf In PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846d53087a1---gifav.pdfIn PDF document text
    • https://xn--80afc2apd5n.xn--j1amh/upload/files/fanotariwemupanizakiwuka.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/zedugek.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c512c1a8489f23d839a0b0f33595c650/91416146691.pdfIn PDF document text
    • http://195exim.com/datas/files/lakujixepo.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/pakurewodoponapapefelaval.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/768323f45a892ac104f16ea86f88b124/mewizavinajex.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2373b88e8---pukoxa.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/kemop6b720fta80uc8n2h4hk11/labovagomap.pdfIn PDF document text
    • https://timjanen.se/anvandarbilder/53/files/75375407234.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/fudunotabuzewekadev.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/1d686c93665c8fc204896761df3e81f4/velew.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/subuk.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/neloruzabefenokopapobuxe.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/8iucvievv6j2ttqpl6jdp1jhef/62559833891.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de0a44dad6d---47515676466.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c696dccad4d---duwilifibarikamiwe.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38740c6271---bokupop.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/kitowax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=monitor+not+migratedPDF 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_off0001426a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426A 10368 bytes
SHA-256: b99be60b4fd395497edb79114e6a84b546320a9913a15da8727e57549cce4308
font_01_sfnt_off00015999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15999 17908 bytes
SHA-256: 55c74c6a5320255007d8af3b60af531708a27a527e81a0537798c8ababae3967
font_02_sfnt_off00018904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18904 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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