Malicious PDF — malware analysis report

Static analysis result for SHA-256 610bc9535e120810…

MALICIOUS

PDF

90.9 KB Created: 2021-07-13 19:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 81e2f59a8743a3720f93d77412ec4870 SHA-1: d980137670f0d3fa38a1d878290778ad84360c73 SHA-256: 610bc9535e1208109e37cfe5a1e3514cadb4344a933477bb67ac4719fd4ca9e5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, directing users to various compromised WordPress sites hosting other PDF files. These secondary PDFs are likely designed to further phish users or deliver additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/6ac4232216b98b21521d27ad0a741569/7925090896.pdf In PDF document text
    • https://telewebmarketing.com/FCKeditor/file/zifarebamomodebuv.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/nujezogigunumutevexizopi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a43010e34.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a861d7c7d8---kifanuvilunibagipot.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/b723aa54d30cd4d7b7de79af7730fc66/59223598692.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d890a5e70f1---51917258515.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/m76ae6j0t58og1jo4bp4bv1jm4/79701469215.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/tup40lcumi4e0mufkrlttdmuj5/28444633209.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/vidasoziluvawusilodo.pdfIn PDF document text
    • https://zzarosiscarampola.it/file/dulonafajafurijot.pdfIn PDF document text
    • http://kaies.net/upfiles/210706055244084688rkudks.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/16225c268a2a615ff39f313bb124d974/6480877017.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/jenmhd1264p59saq5chd94osc7/bidigedanobidukogiwolok.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/1a1707475d752250e7554541f32edbfb/23161955900.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d035668bc7---lozasapamilikivuwoxaja.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/64023875279.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d42ae200dd---vefabowebi.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/e36e5bc2d32023cf2bc5f778b31b7b90/jolonibemapi.pdfIn PDF document text
    • http://fxmeat.com/upload/file/e7e95b47e405bdb3f712e33c8496255f.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b0358315cca70d62330bf498087df646/40165956295.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/68245069956.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b26b9d59b06---kewonodarekilubazuzopapi.pdfIn PDF document text
    • https://actorconseil.com/files/file/xuzopor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=project+manager+resume+objectivePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11858 10964 bytes
SHA-256: a74f0ef31ac97358291f35427aa4e62f3ddd02e016fb8621cc33a6dfe0a5de1a
font_02_sfnt_off000131d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D1 17176 bytes
SHA-256: 224c281e1f617f24f1f33e3802d2c0118ca53f527d500016df917c2192050a1e

Open this report in the interactive analyzer, or submit your own file for analysis.