Malicious PDF — malware analysis report

Static analysis result for SHA-256 c268092adc76e017…

MALICIOUS

PDF

73.9 KB Created: 2021-09-09 15:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a819f3dc6cecd756a9de6153512dcf9b SHA-1: 176477e9bbb8a74a3c8379a05a151fea493ef68a SHA-256: c268092adc76e017a7cb9576c41851fa2a94613e73228d57c13f81b0231f6900
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to link farms hosted on disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites, potentially for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=story+of+seasons+friends+of+mineral+town+free+download+for+android PDF link annotation
    • http://clinivetmadonnadirosa.eu/userfiles/files/36896007060.pdfIn PDF document text
    • http://sabancilojistik.com/userfiles/file/zuwubebirifulugemavinupu.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/piwowarizunuzafipexoweju.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/cb40e844b522c341c81ea03f329751f0/21554188441.pdfIn PDF document text
    • http://huntland.hu/upload/file/kulimug.pdfIn PDF document text
    • https://onecre.com/images/content/files/65835260004.pdfIn PDF document text
    • https://valleyrentals.com/userfiles/file/nomujazo.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/tovotu.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/nopaz.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/56503507140.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/kizexonamatum.pdfIn PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/72731134587.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/19446635748.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136d5c4e6f78---19078070163.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/burebanibodet.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/66221354696.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/21063011588.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210903_E0D2E72364AE3340.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/nowabalurufifiwitonesa.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/kutorag.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/kiriwajawawofisudowumujik.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/fonukesagebupuloras.pdfIn PDF document text
    • 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_off0000b178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB178 10788 bytes
SHA-256: 78726b3ff5cce5dc764c511453ed29d1b306cb96ec4c16c85505c40bd1683ce0
font_01_sfnt_off0000ca5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26D 20764 bytes
SHA-256: ad172f1f63fc68058854c7e2b7a35a29d28b11f7c04f3d41dcd324e88560477e

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