Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eca64869112368e…

MALICIOUS

PDF

84.3 KB Created: 2021-08-07 22:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69f665a00b49bcc8a46ec4282562d140 SHA-1: 5faa7ae43eccc185b9dfcf198343c454704f20dd SHA-256: 4eca64869112368ee13165b21aed8795f533631618a72d526106994d42847fbe
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, suggesting an attempt to direct users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://iqmuseum.mn/uploads/files/50160714549.pdf
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/gefemewugogaxos.pdf
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/99334449500.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a1e7376f529a69630a10d7e9ba003169/44838290475.pdf
    • http://clinivetmadonnadirosa.eu/userfiles/files/93976418444.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/b31725668ec952d31ac79fe9fc843e06/13049213037.pdf
    • https://morganmethod.com/ci/userfiles/files/xevivitopukadovup.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077501c7026d---75420329746.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/97da4aed7e0f0e349b187664e13e7a9d/74004122552.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/ce31570ce620222c194667feac14c921/95099931606.pdf
    • http://xn--2-140-swe8h.xn--p1ai/files/20152301583.pdf
    • http://erdbau-rauch.at/82198406511.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d61264d8385---60664228732.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/82296085613.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3322c54496---65980649956.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/c78476d3d94d19e3bb81ec92082cd339/94682641643.pdf
    • https://fcimoveis.com/imgs/file/duvojusuwimiz.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/hccukjgh5gr9su9nf2u6tj5rit/duxivazowiv.pdf
    • http://classicalgardenfountains.com/uplds/file/51964342255.pdf
    • https://psfund.org/public/uploads/files/cms_files/54092544459.pdf
    • http://www.radio-kum.si/data/files/21074675446.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/0efe45a45c89bae875a838869ef2842c/60938604658.pdf
    • http://gphs84.com/clients/866382/File/32450352427.pdf
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/pajivoverujetevudod.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=becker+cpa+exam+review+2014+pdf+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d3.bin
951ec09b629c686d46409a3c9cdbdf16e78e47d87c2366bbfcdf7b92342e421e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 11284 bytes
font_01_sfnt_off0000fe74.bin
106c8196f5de0acded97a8f50d8d998167e5f4601feaf06da5881822be6534bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE74 17024 bytes
font_02_sfnt_off00012ae2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE2 16792 bytes