Malicious PDF — malware analysis report

Static analysis result for SHA-256 062d78890014748b…

MALICIOUS

PDF

91.1 KB Created: 2021-07-04 05:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cfb5d30f4a11add63b0978590307491d SHA-1: c6aa4b09ff90d9567af2aff2b5f61cf3343d90fb SHA-256: 062d78890014748bcc70d9ed045847409aff88ae0cd0c0e8cdb2a9c197ab0e00
96 Risk Score

Malware Insights

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

This PDF file is identified as malicious by an ML classifier. It functions as a link farm, containing numerous external URIs pointing to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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://philabc.ru/uplcv?utm_term=pip+and+mcp+joints+of+the+hands
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/da9a3a66e2fba4ccf14e5ffe1f49811e/51109462785.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098ad80ec2d2---tinaxepumedamomox.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ab18c1288---mojajuwoziw.pdf
    • https://shiphangnhanh.net/uploads/image/files/64249250489.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6037d243ac---81242625099.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4fa7ad393---2350825920.pdf
    • http://absolutelyneon.com/userfiles/file/titajulezulenedose.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/39f7e8e4db54e0f89f82520676bda33c/bivezilegenofuwufuwarurap.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc46e51e71b---28984360269.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/37ce21d1cb7703f3a9d107dcaaf3b33f/vepurupelugug.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba75dd39033---tamamoxudisebotosibogewi.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c967cfd95---61300759525.pdf
    • https://m-isc.com/userfiles/file/69850603174.pdf
    • http://dagmar-e.de/userfiles/file/gekomulesexisono.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4772853603---tubugadixemo.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/b43f8a157dc386d7d24dbafef37936b0/21211308789.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a46301269---3138239264.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/epvaedhftsvlajtjmf0u54hbk0/motoguzotegiruvufasedaxiw.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/5ucof3oig1s7c9nii8v77rnriu/tufurogidusekiruzes.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/64c12cffe1ee3bd2c3b81b93d8bca0cd/18216381954.pdf
    • 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_off00010399.bin
0c510477d3f5aa056e157e93884b50c9a4c190df7814fdc23a7c493526347b6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10399 10868 bytes
font_01_sfnt_off00011c7a.bin
5882dd53866d078a1f758345721ab8dd25432bacccafe25192d2d15f1672a8a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7A 16772 bytes
font_02_sfnt_off00014781.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14781 16792 bytes